1998 Windsong 35 ft Class A
I don't have a Windsong, nor do I know who built it? But I do have a 35' motorhome on a Ford chassis that we are very happy with. The engine that you have is a 460 cid, as that is what Ford built until it was replaced by the Triton V-10 in March of 1998 with the early release of the 99 Ford chassis with the increased GVWR and complete redesign.
While our motorhome is on the early 99 chassis, the one that you seem to have also has an excellent record for service. But you do need to be very careful about the weight as your chassis is only rated for a GVWR of 16,000#. With a coach of 35' you may not have much weight capacity available for "stuff."
But I have to say that other than taking good care of the coach, it is very foolish to ask now about what is bad about your choice. To ask before a purchase makes sense, but now that you own it, think positive, do all the maintenance as suggested, observe things to be sure that they are all as they should be, and most of all, enjoy the "new" RV! There are no manufacturers who do not have at least some satisfied customers, so you should plan to be one of them for Windsong. If you start to find fault now it could be a very long sad period of ownership. But if you think positive and look for the good things about your RV, you will likely have a good experience if you take good care of it.