We just got our 2018 RadMini a week ago. I've been out on it every day, getting used to how it rides. We have two other eBikes. One is a 3-speed Nexus IGH cruiser style bike my wife rides, and the other is a 8-speed tadpole trike. Both of them have 750 watt mid-drive (BBS02B) motors. The RadMini is our first geared hub motor bike. Since the mid-drive bikes send the motor power through the gears, you need to pay attention to picking the correct gear for your riding conditions. With the RadMini, on the other hand, the motor doesn't know (or care) what gear you are in. It provides the same amount of power in every gear, depending only on the PAS setting you select and/or the throttle input.
What this means is, you can be less concerned with choosing gears to match conditions. You don't necessarily need to shift down to a low gear to start out, but you can if that makes you feel more comfortable. You can shift a lot, like a "normal" bike, or you can be lazy and just leave it in the best "cruising" gear for the speed you want to maintain. Let the motor do the "hard" work getting you up to speed.
Like many others, I am already wishing for a different range of gearing on the RadMini. On our flat roads where we ride, 1st and 2nd gear are useless because I immediately spin out. Even at our normal, slow, around-the-neighborhood speeds, I find 4th gear is as low as I need to go. If I want to ride faster, even when using 7th gear I can't pedal above about 20 mph without spinning out. I am already looking for a bigger chain wheel as described in other threads on this Forum. I wish Rad Power would offer a suitable larger chain wheel in the "Parts" section of their website.
I think the RadMini is terrific fun to ride, and I am very pleased with our purchase. It's a lot of good stuff in a reasonably priced package.