I go into Custom and choose MKV (although I think there was a short time I used MP4, I just like MKV better) and seem to get ok videos. You need to remember you're dealing with 480p, at best, if it's a plain DVD.
ADDED, it also has an MKV passthrough option. It should go faster in most respects and should be the same or very similar quality as DVD.
There is also a way to go into Advanced settings; you have to look for it, and you can change some settings to try for better quality.
I personally would stick with Handbrake. I did not know about that when I first started ripping DVDs. Once I used Handbrake, I had little use for Dvdfab Ripper.
For best performance, strip copy protection with MakeMKV and save to a Hard Drive as an ISO. Then rip the ISO in Handbrake, or if you keep wanting to try Dvdfab Ripper, you can do the ISO in that.