Let me just get the bad out of the way: The battery life on the Air is pretty disappointing. I just commute to the school where I teach, which is only a couple of miles away, and my Swytch does fine with that round trip. But anything beyond— like running into town for an errand— is basically impossible. Admittedly, I live uphill from everything else, so my home ride is a long slog, but I still wish the battery could get me all the way home. I only keep it on power level 1, too, and I can't get all the way back. If you are going more than, say, 5 miles roundtrip, if there are any hills at all, get the Max upgrade or a dedicated e-bike. Or, I guess, Swytch now has that downtube version that probably goes further. I just wish the Air wasn't even an option, honestly, as it hardly even seems worth it. The good news is that this thing makes me ridiculously happy when I am within range. As others have reported, the installation can be a bit fiddly, but it's really nothing major and might take a few go-arounds to get. I really feel that A) the cost versus the cheapest e-bike is amazing, and B) the fact that I get to still use my beloved vintage '85 Stumpjumper (picture attached) far outweigh the effort it took to get everything installed properly. Commuting daily by bike has become an actual reality because of this thing— it was too easy before to be lazy, but now I look forward to the long uphill coming home every day. What I particularly love about this device is that it's NOT super high-powered. It's fairly inexpensive, well-built, and nice looking, and I feel like I'm still riding my bike....just on easy mode. If you have a cool bike you don't want to get rid of, don't WANT a low-power motorcycle, or just want to get into e-bikes without spending a ton, the Swytch is a great idea.