Looks like a new version of the XTherm was released recently. I saved about $100 this week on a large size previous model with the discount. Just letting you guys know incase someone was thinking of getting one. The new model has the fill valve on the side/end instead of sticking up out of the top which didn't matter to me. It is also R6.9 instead of R5.7 and being a warm sleeper I am not worried about that either.