I have the MasterBuilt 2-door propane smoker. I like it (it was my first real smoker as well). One word of caution I had before finding this site, is I would have flare up from the chips/chunks on the tray and get temp spikes. There are some good mods to be found on here that will really help you with any smoker you buy.
Honestly I have never used one, and depending on your intentions, I would look at an electric smoker and the AMNTS (or similar). I have used the tube in my propane smoker, but it took some fiddling to get it to work. I think for a newbie an electric smoker with an AMNTS would help give you more consistent product from the get go. Again never used an electric smoker, but a lot of things I've read on here make me wish I would have found this site before I bought my propane smoker.
Also another problem I found out too late was the size. I cannot get a full rack of baby back or spare ribs to fit across the width (or depth) of my MaseterBuilt. May want to look at the dimensions if you plan on doing many big pieces of meat (whole briskets or ribs), and look at one of the bigger sizes.