There are a few different ones. Which one were you thinking of?
I did my FAA IR @ Santa Monica March 2004. They are a professional organisation, well run, I never had any problems with instructors/slots/aircraft going tech. Flew every day with the same instructor.
Certainly with the exchange rate as it is now (and it was pretty good when I was there) it turned out to be less expensive than I first planned but that was more by luck. And fuel prices have gone up there meantime.
Although I do know there are perhaps less expensive options in the US to choose from. They were able to issue the correct paperwork though and not all the FTOs can.
All depends on what you want to get out of it, what you want to spend and where you want to go!