The quality will be good. The question is what do you shoot, and how much of a system do you want? If all you want is to try a camera that shoots medium format ("to see the difference in quality", as you stated), with few accessories (if any), I think there are options that will give you more bang for the buck, and will not require such an initial investment as a Hassy. If you are on a budget, still want a large system, and are not addicted to square format, I would look at the various 645 SLR systems that are out there.
My personal dream camera for 6x6/645 format SLR would be a Hassy, and it would primarily be used with 645 backs. Going Hassy means that everything for the camera can be pricey, however. Therefore, I went with Mamiya 645 instead. I have a very nice kit with two bodies, three lenses, a metal case, winder, et al for a few hundred less than what I would have spent just getting a basic starter Hassy kit. Plus, I get 645 without having had to have track down several Hassy 645 backs. For square format, I prefer a TLR, personally.
If you are a fan of 4:5 ratio prints (8x10, 16x20, etc.), and can do what you need to do with a larger camera, the Mamiya RB/RZ system is great. Superb quality, and superb versatility. For a large print that aims to fill a standard paper size, the quality will be "technically" better than a Hassy as well, due to less enlargement. (The useful area of a Hassy frame has to be reduced by about 25% if printed to fill an 16x20 piece of paper, while the RB/RZ frame might require just the tiniest bit of cropping.)
...but I would begin with a "starter camera", personally, based on what you wrote. How about a Yashica TLR? A Pentax, Mamiya, or Bronica basic 645 kit could also be had very cheaply now, as could an SQ kit (Bronica 6x6; basically a Hassy clone).