i've lost weight from mine too.
I use my ebike for short commutes and CAR REPLACEMENT trips. Already saved $10 in petrol, and found i'm enjoyed the journey a lot more. Im currently upgrading the 408 motor with a disc, and a part has to be fabricated. I'm also upgrading the wire on the controller while this occurs - its been 3 days without an ebike i miss it already :S
I don't use it as my primary form of transport, but it makes for a good relaxing (or recovery) ride. btw i train 3 times a week on the road bike too.
The ebike is certainly not for lazy people. its fantastic for popping to the shops and wanting to look like a normal person that doesn't drip and stink of sweat.