Old thread - but I'm just now popping back on to the forum after a long time absent.

I have a Ridekick and have used it since they first came out. I've not had any issues with handling or safety at all. I'm not a mad cyclist and don't go excessively fast, or downhill at great speeds, but I've never had any trouble turning or stopping.

I live in a very hilly area and the Ridekick helps me out, especially during the early season, when turning out of my driveway to face a mile and a half hill isn't really fun. It's not a huge burst of speed when you engage the system, it's more of a gradual increase in speed. I've had the battery conk out after a few really steep hills and I've been able to continue the ride without the assist, while towing the trailer behind me, without any problems.

I'm using the Ridekick with a Terratrike Cruiser