DO IT! Make sure you use IPT. I had a very good experience with them, in fact I'm about to have them do a VB for my fzj80 as well.
Its a very simple process, just really messy if your doing it on your back. I think it took me about 2hrs to take out, and 2 more to put back in, and that was really taking my time. Here is a thread where I talked about it:
Clicky
You can't go wrong with this upgrade, I'd even recommend it for someone going N/A.