The Roll also from Specialized, as Collene inquired about, has a similar comfortable geometry to the Como. It can get a more powerful Class 3 mid-drive motor added then is available with the Como. And a longer range battery while keeping total weight to about 43.5 pounds. Cool.
I thought the "Roll" is an ebike model maybe sold only in the US. But it's a normal bike and you suggest to convert it into an ebike? Than I understand even less. I've got high respect for people how do this and of course this is normally cheaper than a ready made ebike. This is great to discuss, but why here? I haven't seen any statement from Colleen that connects her with this way. No complaints about prices, no wish do to such a DIY conversion, no love for a Roll. And as I said before, the Stromer bikes have a different riding position more similiar to the Vado, not like Como or Roll.
The Specialized Turbo Como SL (if that is the SL you mention) is nice and the Small fits riders who are 5'1". It is a mid-drive and that is very good. But the price is high, the power low and the battery very small. It is a Class 3 and that is good. The quality is high.
"SL" is the light assist drive system (motor+battery+control) from Specialized&Mahle which is now available in several Specialized bikes of different types, Vado SL, Creo SL, Como SL, Levo SL.
To complain about less power AND less battery/range with a light assist drive is wrong, you should stay at one point. I get with my Creo SL about 2-3 times the range of my Stromer with only 40% of the battery size in the Creo. I need per mile 15-20% of the energy then with my Stromer. With 25km/h motor limit, with a US 45km/h Creo SL I guess it would be 30-40% (Stefan can compare this... ;-) ). So still more range than a Stromer with it's big and heavy battery. Of course top speed and average speed will by siginificantly less, no doubt about this. But as mentioned before, it's a different type of riding and also fun without any motor support while a Stromer without support is terrible to ride.
The Stromer is heavy as heck. It is a hub-drive and that sucks in a major way. I have attached a photo of one that came to me because it died on a twenty-mile ride with a headwind. She will be riding by the L.A. beaches where there are typically strong winds from the West and she will be doing climbs which will also kill a hub-drive. In my opinion the Stromer is over priced and clunky. The fit and finish is okay but the welds are not that great (zoom in on a weld). They are very expensive to maintain and have many proprietary parts so you are stuck going to a dealer and paying through the nose again and again.
I see many prejudices against Stromer bikes.
Stromer bike ARE heavy, clunky and pricy. But they offer one of the best riding performances of all ebikes according to speed and stability. If this is your primary wish or need, they are almost without alternative. They are also very reliable, much more than many mid motors. I don't know much about Vado/Como and Brose motors, but about Bosch. My Stromer has had much less problems and costs in it's 4 years and 15.000 miles than my Bosch before in the same period. There are several riders in Europe which have already done 30.000-40.000 miles with their Stromer still with the first motor. I doubt that any single mid motor of any ebike has ever reached such milage.
There was a private database until two years ago where many german ebike riders posted since 2012 all problems with their drives/motors. There where about 100-150 of Bosch and already 60 Stromer riders. There was one(!) changed Stromer motor among all these in 600,000 miles of all 60 Stromer together. Seems like you found the photo of this changed motor... ;-)
There were about 40 changed Bosch motors among all these Bosch riders. On average Bosch motors were (are?) changed every 6000-8000 miles.
This comparison is not really fair, as a Stromer motor is very expensive (also for the Stromer factory) and a Bosch motor is quite cheap. So Stromer tries to avoid motor changes while Bosch is very generous in changing the motors for free if a problem or noise appears. But it shows that Stromer motors are far from "unreliable"...
But of course you need an experienced Stromer dealer and with good connections to Stromer in Switzerland. Also the "dealer net" is much smaller/less dense the for example for Bosch. You can't repair much on motor/battery on your own (neither with other drives...) and I also know riders and also dealers who struggled with Stromer Switzerland.
Colleens experiences with the old ST1 and a new ST3 are not typical. The ST5 had some problems in it's first year, ST3 was a little bit more stable. Today/2021 both are normally very reliable.
The ST1 on the other hand was one of the first Stromer with quite old technology and quite some problems and also not that strong and lasting uphill and sometimes with overheating problems like you mentioned. These problems are history since 2014 when the ST2 came out. You can't damage anything uphill in the drive no matter which mountain and you need a very hard and long uphill with Stromer after 2014 to make the system reduce significantly power to prevent overheating. It's correct that hub motors in general are less good for uphills and soon reduce power up to zero power for example with small&light 2kg assist drive hub motors (like X.35). But the big hub motors like in Stromer bikes have enough power to "overrun" any uphill. I did several mountains with my Stromer (so did many others) but I was unable to damage ever anything or to reduce power to zero. On the hardest uphills motor power/support was on near top similar then with my Bosch ebike (but overall support and speed that mountain and on the whole trip much bigger).