I used the *IFR with Confidence* video just before going to Florida for FAA/IR earlier this year and found it an extremely valuable run-in to their wx briefing ,IR procedures and other stuff which differs significantly from UK.
[Also highly recommend asa books, and FAA test papers, but get the up-to-date book and 2003 AIM/FAR book, before you go. I got mine from Amazon when Transair couldn't come up with the goods in time.]
Sure Martha is a bit of a joke, but beyond the syrup there's tons of common sense.
Light years ahead of the UK 'Into IMC' which was a bit like watching the woodentops.
If you're training in US, makes eminent good sense to get the US videos and worry about UK differences later.
BVut most of all enjoy the Florida experience.
Safe flying