It's good for pre-AGA Amigas without video cards, IMHO. Animations & stills are simply stunning due to the range of colors available. It was probably the cheapest way at the time to add more colors than unexpanded pre-AGA Amigas offered, and you didn't need a video slot to use it, either.
If you can't find the original Digital Creations (now Play) drivers, send me an e-mail.
Capture is slow and not very clear. I'd guess it would also depend on the video camera source.
There is also a DCTV RGB Converter so that it could be hooked up to a genlock. This was sold seperately. It hooks in between the pass-through of the DCTV and the genlock. I've got all 3, the DCTV, the RGB Converter, & the SuperGen SX genlock.