I owned this set, was one of the last sets I got before I got out of legos. I was glad to have gotten the set, it has some nice pieces (all the rocks, slopes, arches and big green plates). Also, some the features were kind of cool, like the hidden entrance and the falling rock.
However I think the execution is pretty terrible, as with other FK sets, the colors are pretty obnoxious and overly-cartoonish, and the form of the structure as a whole just isn't that pleasing to the eye. One of the ugliest sets imo.
Also as I remember it, even though the set was rather large, with the huge number of burps the construction was overly simplistic and lasted all of about 5 minutes.