I have a couple of S/S button downs from Key West and some other past themes and fit and finish is what you would expect from the L/S and great for summer. It really depends on the shirt, some have linen in them which is nice.
A customer of mine flew in from Japan to stay at a seedy motel in Kent, WA specifically to make bulk purchases through the RRL website and ebay, wait at the motel for a few days for the deliveries and then take back overseas. He saves a lot of money on shipping and customs fees that way and he explained he also enjoys vacationing in Kent. Sounds like a great plan to avoid the hassle of flying around to various RRL stores and trying to find desired sizes of desired pieces in person. Website has made it much more productive for resellers. My advice is if you guys have your eye on something in small sizes to buy it before it all disappears in the next few hours/days.
The website sale is definitely bananas, lots of great pieces to be had. I had my eye on the raw denim jacket and the sueded boots but they're both out of my size.