After reading this post I am concluding that most people do not know how to lay laminate properly. I have had it in my 17 Boler for 4 years in Calgary with winter temps down to -30C on occasion with no problem. No swelling, buckling etc.
The secret is quite simple. Lay it like you were doing on a concrete basement floor in your house. First lay a vapor barrier. I use two layers of 15 lb. roofing(tarred) felt overlapped by 50% between layers. Then lay the laminate. I would suggest that if you are searching for the cheapest laminate then that is what you will get! It is made of cheap materials, with a cheap top laminate, with inferior locking structure, etc. Leave 1/4 inch at edges for movement and expansion. I also prefer the glue together laminates because the glue provides a water tight seal between the grooves. I suggest that if you get the click, lock together you also glue the seams as well. Water on the floor is only a problem when it seeps down into the seam and gets under the top coat of laminate. I have had spills, dog mishaps, etc. I try to wipe it up immediately but that has not always happened. I still do not have any swelling.
I have abreviated how to install so if any one wants a more in depth description let me know.