I scan at 3200 ppi which gives me a stupid 8500x6800 negative (6x7) weighing in at 170Mb per image. This allows me to print at 400ppi at 16x20 inches (A2 ish) which is far bigger & better quality than I'll ever need. The problem I have is that scanning isn't my weakness. Taking a sharp, well exposed image is. the benefit of this is that my hard drive isn't clogged with images - I think I scanned just 2 off the last roll (which also cuts down on scan time!)... In fact, so far, I've got one - yes one - image
I'm actually quite pleased with. Although
this one and
this one show decent quality & sharpness even after Flickr has butchered them.
The plastic neg holder that comes with the scanner is... well... quite crap and some films bow terribly which makes focussing difficult. There are options for third party solutions, but it's not worth it to me at the stage I'm at. If I ever take a really decent, sharp image, I'll look at wet mounting for a proper scan, but the results with the V550 are easily good enough for me (I don't sell anything - it's all for personal work)
The images linked above are all 2000px Flickr resizes (so 1/4 size) and you can get in quite close even at that resolution. I don't mind mailing you a full size version of any of them if you want to PM me your email address. Just take all the above into account.
I guess if you've got lots of negs lying around from "the olden days" then it's a brill solution. I haven't counted my Great Auntie's 127 film, and all the crap I took on 35mm back when I had hair, but seeing those memories again was lovely - esp printed to A3.