I agree with what Kens said about going off track so to get back to what you are asking about -the little mill.
I have both, a version of that mill (many different brands of the very same basic mill out there) and a Bridgeport but even with the Bridgeport sitting in the same shop I use that little mill a LOT just because it's so darned handy! There are almost endless things you can do with that mill and while it would be next to useless in a "real" machine shop it is great for for a hobbyist not looking at production times and/or doing big jobs. For most gunsmithing projects that little mill can be very handy but it does have some shortcomings that need to be addressed, for one it's limber as the proverbial wet noodle and has a well known head drop problem that can a real pain especially when drilling and then there's the issue of the plastic drive gears and the too short head travel rack gear. The bad news is all these things combined make for a very poor experience when trying to use the machine as it comes "out-of-the-box" but the good news is ALL these things are easily fixed and cost almost nothing to do. Once these mods are made (they actually make good first projects for the mill!) it becomes a MUCH better and far more usefull machine. These mods are well known and there are several web sites dedicated to these little mills and how to deal with these much needed mods, of course you could just go to Little Machine Shop and buy everything necessary to address these problems but it's a lot more fun and WAAAAAAY cheaper to just do it yourself with odds-n-ends most of us have lying around the shop and maybe a few inexpensive items at the local ACE Hardware store.
My recommendation would be to go ahead and get one of these little mills if you are interested but shop around and you can often find them cheaper in a different color/brand of the same mill, as pointed out by someone else make SURE it has the R8 spindle however. On Craigslist they turn up fairly often at really good prices and sometimes even have most or all of the mods already done, those mods are IMHO absolutely necessary but at the same time are no reason to avoid these little mills. The mods may be needed but with a bit of time and thought they are neither difficult nor expensive and make that little machine a lot of fun to use.