Sorry, but I'm going to call BS on this urban legend. I own two Indivisions, both which are hooked up to high quality displays, and have zero problems with scrolling. It *all* depends on the type of display you hook it up to. If you use a cheap cable or some cheap-@ss TV or old monitor yeah, you'll probably have problems, but anything with a modern refresh rate should zoom right along. Money for Indivisions = money well spent, IMHO.
Or maybe your eyes are just better than mine. :crazy:

Modern refresh rates exactly _are_ the problems. If you go anything else than 50Hz you _see_ the stuttering in scrolling. When the output from old Amiga games is 50Hz and your display is something else, there will be skipped frames which is seen with "normal" eyes. And while you can configure for example Indivision AGA mk2 to 50Hz modes, it still doesn't support V-Sync and scrolling won't be smooth. This is much complained and requested feature with Indy mk2 threads.
If there are older scandoublers with 50Hz V-synced outputs, then fine I take my words back with them, they should be good, but they require 50Hz support from monitor too. Most modern LCD monitors start from 60Hz and that's a problem.
Anyway, Amiga is known from its smooth scrolilng games, so it's a shame to lose that with some solutions. Good examples are platformers and pinball games... let SlamTilt scroll its table and you'll get very annoyed with not fitting refresh rates. At least I do with my Indy mk2

But for some kind of games it's not that bad.. if game doesn't go in one frame or is 3D etc where refresh rates aren't steady anyway, eyes don't catch it that easily.