I bought the Intellitouch (after reading this thread initially). It's simplicity itself but I would advise getting the posh model with the backlight, well worth the extra few quid. Sometimes doesn't like the bottom E for some reason but usually finds it - eventually. I jump between tunings so it's great for getting the tuning sorted out quickly - no more of the '5 to 1' tuning method !! Also folds back on itself so you can leave it attached to the headstock - just don't forget it's there or you'll be getting the superglue out. I've also really noticed the difference now that the guitar is properly tuned each time. Works great on the kids' Violins too.