My wife and I purchased a 2012 Prowler 29P Ti this July. We have only made a few trips in it this year but have a 2 week trip coming up this October. The 5er is nice, just what we were looking for. There were a few cosmetic problems that have been taken care of by the dealer with no problem and Heartland taking care of the tab. We have owned a Terry and a Springdale trailer in the past, no complaints with either other than not enough space.
Only complaint with the Prowler would be the water pump. It is a little noisy and the dealer said there is nothing wrong with it, it is just a cheap pump. Can't say if it is or not but not noisy enough to be an irritation and we have only camped where there is water, so it has been a non-issue so far. Other than that we are quite pleased and would purchase it again if we had to do it over again.
This is the Titanium edition of the Prowler and it tows like a dream. Never a disturbance from other vehicles or the wind. This is our first fifth wheel so can't compare that experience to others. I have not heard nor experienced anything bad about the Prowler. It appears to be of the same quaility of other Heartland fifth wheels minus some of the luxuries. Don't get me wrong, I'd love to have a Big Horn but did not want to pay the extra cost or tow the extra weight until I have a chance to see what I was looking for in a fifth wheel. We have not been camping for about 12 years. So far the Prowler has exceeded our expectations.