I have a Tarot and a pair of RCTimer brushless for GoPro. All three of them combined cost less than one DJI H3-2D and as far as I can tell they work exactly the same or better. Granted they don't have the fancy builtin Hero3 connection or the hidden wiring of the DJI unit but on the other hand they are complete independent units and flight controller agnostic. Hang them under whatever you want and go fly, or for that matter attach one to a set of bicycle handlebars and have a homebrew Steadycam, can't do that with a DJI unless you connect it to a Naza or WKM at the same time.
The RCTimer units are definitely a hands-on assemble and setup proposition but they're quite sturdy and you can put any model of GoPro or similar size camera on them as long as it fits within the tilt cradle framework. This link will take you to a video of one of my RCT gimbals being given a good workout under my MK FPV quad...
http://www.youtube.com/watch?v=K5_JpWGqUro
The Tarot gimbal is smaller and more streamlined than the RCT built in a similar manner to the DJI. From a quick glance at each it almost appears that the same engineering team designed both although it's more likely that one is intentionally built to resemble the other as much as possible. The only downside to the Tarot for my use is the fact it only takes the Hero 3 size GoPros, otherwise it's as close to true plug and fly as things get in this hobby. This is a link to the first test flight I did with mine hung under the same MK FPV quad which is also my testbed for small gimbals...
http://www.youtube.com/watch?v=vRi_tdowk64 At this point I hadn't even connected the controller board to a computer, I simply assembled the few pieces that needed to be and mounted it up then flew. To this moment I still have not changed any of the settings, seems to be pretty much as dialed in as one of these can get. Eventually I may upgrade the software once it matures a bit more and maybe then I'll try tweaking some settings. For now it works great and the best part is it cost a whopping $182 delivered to my front door
Ken