Electric bicycle upgrade advice
I've had a bike for a few years now and recently started using is as my main transportation (got sick of late and expensive buses). Its a matts TFS 700, like this one pictured here: http://s.sbito.it/images/16/1619332739.jpg
Anyway I travel 9 miles each way on this to work and I'm managing the journey fine. However I'd like to shorten the time its taking me to get to and from work, especially getting back home as I often finish at 10pm and its mostly up hill on the way back, so it takes me over 50 minutes (especially after a tiring 10 hour shift).
I decided I'd like to upgrade the front wheel to electric. Nothing powerful, just enough to assist my pedaling to speed things up a bit, would be great if I could pedal just the same as I do now but get home in 30 or so minutes rather than 50+
So I had a quick look on Amazon.co.uk and found some kits between £200 and £250, mainly Barsoom 36V 500W kit and a Sainspeed 36V 250W, both get good reviews from customers and considering I don't want anything special at all I assume either of these will be ok? Of course I'll look around more before deciding what to buy, but just wondering about these kits as a base line.
However I was wondering will there be any obvious problems fitting these kinds of kits to my bike in particular? Also do these kits have any problems with rough terrain? On my way to and from work I have to go through two woodland areas. Both reasonably well taken care of paths for the most part, but they do still have some bumpy and potted sections and I was wondering if the motor on these kind of kits could have problems with being jarred on these kind of off road paths?
Thanks for any advice you can give.