Just after Xmas I bought the 500w rear wheel kit from EBC. I ordered it over the phone rather than from ebay or the website. It was ordered at around 1pm and it arrive at 11am the following day.
I opted for the rack mounted battery rather than the bottle mounted one.
This comes supplied with the rack at no extra cost, and it is a 2 tier affair, so is used to hold the battery, but also can be used with panniers.
I was impressed with the what is supplied in the kit, as it included a crank puller, plenty of cable ties, and even a 2GB thumb drive containing the video of the kit being installed. The video is also on youtube, and if I'm honest is quite useful, but could do with being updated slightly.
It took me about 2 days to fit the kit although I did take my time, it was new years eve after all.
I noticed a couple of loose spokes as it was putting it together, I tightened them up, but on my 1st ride out (up the road and back), the wheel wasnt very straight, and when I got home I checked and one of the spokes was loose again.
I emailed them and they were very apologetic, and sent me a new wheel the next day, followed by a courier to collect the faulty wheel the day after.
The replacement wheel is perfect, although I only got round to re-fitting it yesterday.
I'm fully aware of the legality or not of these kits, I've spoken to a chap I met who has a 48v 1000w front wheel kit, he has been riding to work on for over 2 years, and hasnt been bothered by the police once.
On this system the max assisted speed and throttle speed can be limited, and is set to 25kph. It is not possible to change this (easily) while riding.
You have to turn the power off with the key at the battery, in my case the battery is at the back. Leave it 10 secs, then power the battery back on.
Then power the system on with the button on the handlebars, and within 10 seconds hold the up and down arrows for 3 seconds. Only then do you get to the adjust the max speed setting. During this time the system doesnt work at all, until the setup has been saved.
Overall so far For £395 I'm very pleased with the kit, the components and the aftersales, both over the phone and via email.