The biggest problem I found with DV capture is that is uses 4:1:1 chroma subsampling which really reduces the picture quality.
I tested it for laserdisc capture, and found it wanting:
Airplane LD captured as DV (4:1:1):
Same disc recaptured as Lagarith 4:2:2:
In 4:1:1 chroma subsampling, the horizontal color resolution is quartered to reduce the bandwidth by half. In 4:2:2 chroma subsampling the two chroma components are sampled at half the sample rate of luma: the horizontal chroma resolution is halved. This reduces the bandwidth of an uncompressed video signal by one-third with little to no visual difference.