we had a jayco before our current trailer, loved the trailer but it was just to small. so far we have not had any problems with the prowler, the super slide is awesome, we have a large group at times adn we do not seem to get in each others way like in the smaller trailer, It would be very hard for us to have a trailer with no slide at this point, the slide is quite simple and so far maintenance free (Its a 2001) we do lubricate the mechanism periodically.
I to was concerned with fleetwood quality also from hearing horror stories on other forums, My feeling is Fleetwood is the largest manufacturer of RV's, so they will likely have more "Problem Units", all manufacturers have lemons that roll out of the factory, We had to have an entire new floor put in our Jayco (Warranty Work) - would I buy another Jayco?? absolutely, jayco service was very good for us.
For what we use the trailer for it works out great , If I needed a trailer for more extensive use/Living I would consider teton or travel supreme - they have a premium cost but you get what you pay for.
I would not discount fleetwood based entirely on all of the horror stories you may have heard, Look in the campgrounds you will see many fleetwood products both new and older units.