I've been considering getting a variable output isolation transformer for quite a few years, but I always assumed that they were expensive. When I purchased a Japanese market synthesizer (100 volts AC power requirements), I needed a step-down transformer. During my search, I came across this little gem at a very surprisingly reasonable price. The reviews were good, so I bought it.
It was shipped right away, and arrived within 2 days. It's a wonderful unit, and it works perfectly!
I would highly recommend that AC-DC PowerShack be checked out if you're looking for this or any other product they carry. You won't be disappointed!