I got my Powabyke second hand. Yes, it's heavy, but it is a very old model and a lead acid battery, but after riding it for a week the weight of the bike wasn't an issue, just took a little getting used to.
A couple of times I've had to rely on the power alone to get me home and it has done the job.
The more recent lighter Powabykes are bound to be far better than the model I have, and certainly FrankC (fcurran on this forum) of Powabyke has been of great help to me when I've had a couple of questions.
Another great thing about Powabykes is that they have a wide dealer network, so it's not too difficult to get the bike sorted if there is a problem.
I'm glad you have found the powabyke useful, and I do admit they have a much wider avaliability, they even have some local to me! But my experience suggested the finish was very rough - bits of metal sticking out, a spoke loose, and the motor didn't work. That and the weight, really put me off.