I wouldn't take this unit off the dealers lot without wear strips installed on the fridge slide-out and maybe the other superslide. Not need on the bedroom slide-out.
Here's a couple of threads to look at. Most likely you will have to deal with one or both. Now you have the knowledge going forward.
We have a 2013 Lacrosse 327 RES, and love it. So far no problems or concerns other than just normal wear and tear. I do not have the problem of the underside wearing at this point.
__________________
Paul, Deb and my girls Rachel and Brooke and the pup, Biskit
_____________________________
2013 Prime Time Lacrosse 327 RES
We have a 2013 Lacrosse 327 RES, and love it. So far no problems or concerns other than just normal wear and tear. I do not have the problem of the underside wearing at this point.
See you have a seasonal campsite. Do you keep your slides open or close when your not there?
Keeping the slides open for the season would greatly reduce any wear.
We have a 2016 337RES. Love it. The Windows in the large slide attracted us to that floor plan. We ordered it with the 2nd AC. I highly recommend this option. You can't add it later. We picked it up in March and have used it extensively to date. No issues other than a few minor things. We have not seen any wear in the underside of the slides (yet). You will love the unit.