I installed the mast boot a month or so ago and it works great. I know I've seen complaints about water in the cabin and I think I've finally solved it. It included the mast boot, silcone sealant in the mast track, and weather stripping around the sail cover collar and mast boot collar. Sounds like a lot - but everything only took about 15 minutes including the mast boot snap installation. Below is a link - not sure if this forum will convert it to a html ink or not...
http://kb.sailboatowners.com/brand?post=2067
http://kb.sailboatowners.com/brand?post=2067