Never used one but from posts on here the Butters machines get rated very highly, if it's a tidy machine and working as it should I would part with that sort of money every day for one.
I have been using one of these since 2008 and can't fault it, the thermal cut out kicks in now and again at full whack, it works really well at low settings. I have always run it on a 13amp plug off an extension lead with no problems.
a good machine.