I use a Pen & Touch Medium too, and every word of heterodont's post is pure truth.
Honestly, the choice of what tablet to get seems massive before you buy one, but then after you get one, you realize all that really matters is comfort, reliability, and pressure sensitivity - and reviews are extremely unreliable when it comes to these, especially since you never know how well the drivers will work with your particular computer.
For example, like ^, my driver also crashes and has to be restarted 5 times a day, but usually only when I work with Photoshop. With Manga Studio or any other program - except GIMP, where it doesn't work at all - it's fine. Those are the kind of things reviews can't tell you because they vary wildly from computer to computer.
(But no matter what tablet you get, memorize this. You'll need it. A whole lot.)
I will say, though, that I recommend the P&T over just the Pen because the touch functions let you use it as a complete mouse replacement. I haven't used a mouse in three weeks since getting mine, and I don't miss it at all. However, if you don't want to use it that way, don't bother, and just get a regular tablet, cause you really don't need the on-pen eraser. It's actually faster to use the B and E hotkeys to switch between brush and eraser with your left hand then to stop drawing and turn the pen over. You can find a used Intuos 3 or 4 for cheaper on Ebay and don't mind waiting, that's also perfectly fine, since industry pros used it for years at all the best studios, after all.
Huion and Monoprice also make alternatives that I've heard good things about. Their drivers are less reliable, but they make up for it by being like $100-$200 cheaper than a comparable Wacom.