Once you get use to it, you either love it or hate it.
I use a badger 150 I bought when I got out of the Navy... 1972, still going strong, only repair has been a new air valve, and that was about 20 years ago, plus the normal wearing out of a needles and tips.. Still got the original heads though but buy a few extra little teflon gaskets for behind the head, they are small they do wear out, and they do get lost.
I spray everything through it, from acrylics, enamels, lacquers, watercolors, and inks, never had a problem, just a lot of practice.
I simply spray thinners through it between color changes, (Depending on what medium I was spraying is the thinner I use) and strip it when done. Stripping it seems like a big deal at first, but it usually doesn't take me more than a few minutes to strip and clean it.
I also have a Parsehe VSR 90, good brush too, unfortunately it's so old I can't find the parts I need, so it's sitting in the sick airbrush locker until I get the parts. I also use an Iwata HP-B, fantastic for fine spraying, low pressure, But I like my badger 150 so much, I bought a second one last month to use at work, (I do most of my building at work on the afternoons and midnights shifts)
Like I said, you'll either grow to love it or hate it, and just remember, airbrushing 90% practice, practice, practice, 10% feel, you need to get to "feel" the airbrush.
From experience, I found out that after being away from modelling for a while, when I started again, I had to practice all over to get the feel of it back,
Oh one more thing, don't expect the HD head to do the work of the XF head. It won't..... you need to learn which head and needle you need to use for what medium you are spraying. I don't suggest you use the XF head for acrylics, unless you like cleaning it alot, but for inks and watercolors, the XF can't be beat.
One more thing.... parts for a 150 are easy to find, and really are not expensive when compaired to replacement parts on some other air brushes.
Good luck, and post some photos of your work