I have one of those. I use an Adapt-A-Roll 620 with it. You can use 120 film in the AAR 620, you just have to make sure to use a 620 spool for the take up. It will feed off a 120 roll just fine.
There are some issues with it. It's not easy to load (but once you get used to it, it's not too bad). You have to either develop the film yourself, respool it back onto 120 rolls, or ask the lab for you 620 roll back (they're not impossible to find, but why go through the extra hassle of having to replace a 620 roll every time you shoot a roll of film). Also, because the 620 spool is so much smaller than the 120, they have a tendency to unwind if you're not careful. So keep that in mind when you remove the film. And lastly, the AAR 620's are pretty old and will probably work a lot better if they are properly maintained. Mine had issues with skipping frames and wasting film until I cleaned the rollers and properly lubricated it.
Other than that (and it sounds like more trouble than it actually is), it's been a great little companion for my Pressman C. The 6x9 negatives are great and using the camera as a rangefinder is a lot of fun. Plus I didn't need to do any modifications to the camera. Using flash bulbs with the "light saber" is also a lot of fun (and the flash handle makes a convenient grip when the batteries aren't installed). I do wish I had a sharper lens for it (mines a Raptar 101mm), and a wider lens would be nice (and I actually have a 65mm Schneider for my 4x5 that would satisfy both needs), but then I'd have to recalibrate the rangefinder and find a new lens board (which is the Achilles' heel of these cameras). Plus, I use that lens a lot on my 4x5, so moving it over isn't really worth the effort. Especially since I have a 4x5 Speed Graphic with a rangefinder (should I feel the need to go that wide).