Hi Subevo,
My wife has a Powacycle Windsor which, as Flecc points out, is identical to the Salisbury apart from step-through frame. I've ridden it quite a bit, mainly on a 12-mile commute to work (which it does in about 55 minutes, with significant pedalling from me), and have been pretty impressed. The pedalec system is, next to the Lafree, the best I have tried, as it pushes you along gently without any odd jerks or jolts, but also gives you the option to boost with the throttle when you want to. The AtoB review, which is reproduced on Powacycle's web site, gets it more or less right.
We went for the NiMH option, with a spare battery for range and flexibility as they are reasonably priced at £100.
As Flecc also points out, the Ezee Liv would also be worth considering. No personal experience but it has been liked by others. In favour of the Liv is that I am sure it is a little faster and it is significantly more powerful than the Powacycle. Against is that it has fewer gears for hill-climbing, is a couple of kg heavier, has an older and slightly nosier motor, is £200 more than the NiMH version of the Powacycle, spare batteries are more expensive and it is only available from one UK distributor (50 cycles).
I suspect, but don't know for definite, that the Liv's pedelec system may not be as pleasant to use. Others will confirm/deny this but I believe that on the Liv you may have to keep the throttle twisted the whole time, which can be irritating. On the Powacycle you don't need to keep the throttle twisted if you are pedalling.
Final thing to consider is that the Liv is front wheel drive while the Powacycle is rear wheel. There are advantages and disadvantages to each (front motor gives you more gearing options, better weight balance and two-wheel drive, rear motor gives you less handlebar vibration, more of a bicycle feel with lighter steering and possibly better traction on hills).
I suggest you try both and tell us what you think!
Regards,
Frank