OK, I am admittedly an ebike novice. Having said that, I just got this bike put together and rode it only about a mile. It's cold here this time of year. I probably should mention that I'm old (77) and can't quite ride the hills here (Ozarks) like I used to. Just the short distance that I've ridden this bike has shown me that I will be able to get the exercise that I want and be able to ride up the hills that I couldn't previously.
The bike appears to be well made. Quality should not be an issue. I have done some research on ebikes and this one appears to be a bargain. It has a powerful motor and decent sized batteries. That alone puts it in a league with more expensive bikes. Now, that doesn't mean that it's the highest quality bike that you can buy, but, you'd be hard pressed to find this much quality and features at a lower price. Bottom line, I'm very happy with my purchase and yes, I would buy it again. I am unable to comment on longevity, however, having assembled and ridden dozens of ordinary bicycles, it looks as though the quality should be sufficient to last a good long while. Assembly is very easy for anyone with some mechanical ability and should be doable for those with very little. If you've been contemplating buying an ebike, give this one a look. It's nice.