It's a pretty impressive piece of kit. Heavily built, fast belt changes, versatile, superb range of jig accessories, very accurate...and if you wear Union Jack underpants it's nice to know there are some quality items that are still British made!
From a user perspective it's in that sweet spot between power grind stones (fast but risk of bluing) and a Tormek (mind numbingly slow but no risk of bluing), plus it has an advantage over both of them that you don't have to true the wheels.
Some people might prefer a hollow edge, and fair enough if you're in that camp then the Sorby isn't for you, plus I find there's quite a gap between the tool rest and the abrasive (although a little ingenuity with a secondary rest will sort that out). But on balance, and having spent many years with a grinding wheel and a Tormek, it's now my preferred tool for grinding. In fact with a trizact belt it's also my preferred tool for plenty of honing tasks too.