I just bought the one the spurg was selling two weeks ago. Yes, it does take a long time to shape something, forever when compared to a dry grinder. Once you go through the shaping process, sharpening is really easy, consistent, and an absolute pleasure compared to a dry grinder. I never really know how difficult turning was until I had truly sharp tools!
Not having to apply much pressure and allowing the toll to 'cut' on its own is a dream.
Yes, its expensive, but its quality, and will likely last a long time. So far, my 1" skew took the longest to reshape, and my 1/2" bowl gouge only took minutes due to the thinner amount of metal that needed to be shaped. I actually have a grind on my bowl gouge that I can repeat consistently, it does not have a blued tip, and is sharp.
Oh, I will still likely use my grinder for scraping tools and maybe roughing gouges because they do not lose temper as easily and it is much quicker. They're shape is also not as important as skews and bowl gouges. The leather honing wheels on the Tormak come in handy though.