Paintless dent removal kits - where to buy in UK?

[MasterBlaster]

I have a few dents on my car which I would like to get removed, and thinking about learning the art and doing it myself and hopefully help others if it works oK. Seen some demos of the type where a pulling tool is glued to the panel and the dent "worked" out. Anybody here have experience in reliable kits where I could buy online?
I have seen some cheap kits on ebay but they don't look up to the job.
https://www.youtube.com/watch?v=-jbyqKbuAno



Thanks!