I got an IZip Zuma a month ago and I love it. It's a great bike. The only thing I would caution you about is making sure you are not too big for it. I think it only comes in one size, and anyone over 6 feet tall will find it too small.
I purchased a used 2011 Izip Zuma 3 months ago and I absolutely love it! I have some health issues and need the assist to go up steep hills around my house. I average 10-15 miles per ride and I am really impressed with the build quality. I am 6-1 and 270 lbs. so I have to be careful not to over burden the motor. I find that using just the assist up the hills and against strong headwinds really helps me enjoy riding a lot more. I would recommend this bike to anyone!