I’ve owned an OHM XU450 bike since last December. I’ve now ridden the bike about 2600 miles – about 250 miles/month – and everything still feels like new. All in all it’s been a good experience. I wanted to ditch my Bimmer for going to work, and to get a bit of exercise when going home, which is all uphill. (I live in the hilly part of Irvine, California.) These objectives have been met. On a few recreational trips I’ve taken I got from the battery about 40 miles, which included quite a bit of up-and-down hill portions.
But, properly adjusted, it’s whisper quiet unless I neglect to use the proper level of motor assist, such as dialing in a higher level of assist in the midst of a steep hill. You must get ready for it. This isn’t unlike shifting gears in the middle of a climb. Going home is all uphill. This is where I enjoy passing the many amateur cyclists in full Lycra jersey riding carbon fiber bikes. I wish I could see their faces while being passed by an old guy on a heavy black bike. (Of course I cheat!)