I have used dragonlock for quite a while now and I really like it, but this rampage kit offers a lot more versatility, though not as much detail. For functionality, and a good lucking set of dungeons, these work really well. I print them at 200 micron resolution for speed, and there are some minor issues with overhangs at that resolution, but it works really well.
The openlock system is quite good. Almost too good. Once locked, the pieces hold together as if they were one piece, but it is quite difficult (though far from impossible) to disconnect them afterwards. I funded rampge on indiegogo and look forward to the rest of the pieces. The starter kit really is great, and with just the starter kit you can make basic dungeons without an issue.