I have the Giant Road E+1 Pro (2019) and it has been a great bike for me - I posted some notes on my first few months with the bike that can be viewed with this link
https://electricbikereview.com/forums/threads/giant-road-e-review-and-questions.23941/page-2 - I'll paste those notes in below as well
That review was done about 1 year ago - since then I have put well over 8,000 miles on the bike and continue to love it - the only issue I have had is brake life - I am lucky to get 1500 miles on a set of pads and am on my 2nd set of rotors - considering that the bike + rider weighs about 250 pounds that may not be unexpected.
dave
FROM FEBRUARY 2019
Good day, all - I am a new member on the forum and thought I would take a few minutes to introduce myself and post some observations that I have made on the Giant Road-E+1 Pro that I purchased a few months ago.
I have been a road rider since 1988 and generally ride 7000+ miles per year. Some cardiac issues last fall convinced me to consider an e-bike and I am thrilled with the experience.
When I looked at the Giant road bike I liked what I saw with one major exception, it came with Shimano components. I have been a Campy guy since I started riding and asked my local bike shop to contact Giant to see if installing Campy components would be a problem. They reported that it could be done. I ordered the bike and my mechanic removed the Shimano shift levers and rear derailleur and installed Campy Chorus components. While some vestiges of the original drive train remain, from my perspective the shifting and braking are all as I have known it for decades.
Now for some observations.
1. After a month or so of riding I had a really unpleasant experience when the bike decided that it would not give me any "boost" above 10 or 12 miles per hour -- I struggled to complete a 30 mile ride and returned the bike to my LBS expecting the worst. After several calls to Giant one of their mechanics suggested that the controller may have gone into DEMO mode. He explained that bike shops can limit the speed and "boost" by pressing the LIGHT button 5 times in rapid succession. Doing the same again returns all to normal. That is what had happened even though no one had ever pressed the light button so much. Please note that the display never gives any indication of being in this mode.
2. The battery will not charge when very cold. After a ride in the teens (Fahrenheit) I plugged in the charger and the LED on it stayed green. Suspecting a temperature related issue I waited a few hours (leaving the bike in my warm garage) and it charged as it normally does. I have read that lithium batteries don't like to be charged when cold so this makes perfect sense. As to using the bike in cold weather that has not been an issue.
3. I was surprised a few weeks ago when a message appeared on the display that said that my e-bike needed service and a small wrench icon appeared on the screen. I fired up the App and did a quick review of the bike and it showed all systems to be A-OK. It turns out that the bike is set to give this message after about 1200 miles (2000 km, perhaps). My LBS was able to reset this and remove the wrench icon from the display. The interval to the next such message was changed to 4000 km
4. My display shows a speed that is about 2.5% high - I have found no way to adjust wheel diameter nor has my LBS.
5. I changed the % boost for the 5 levels using the phone APP. I generally stay in the ECO range and have it dropped from 100% to 75%. This is usually more than enough assistance for me and the battery is good for well of 60+ miles in hilly Western Pennsylvania.
6. The tires have been great. I have about 1500 miles on the bike and they rarely need air and show very little wear.
7. When using the APP (I have an Android phone) make sure you cleanly exit the APP after connecting or the controller may hang. I just keep hitting the BACK button on the phone till is asks if I am SURE I want to exit.
All in all I love the bike and am considering ordering another set of wheels with heavier tread to use on the local trails.
I hope something in my musings has been of use to you.
dave