I was EXP for one year (2007) and only flew domestically. There is no way that I would spend $2000 for it. Although it was nice to have priority for unlimited upgrades, I got screwed by not accumulating 500-mile stickers for 2008, when I went back to PLT. My upgrade percentage was about 80%, and I missed out on some valuable trans-cons despite fully utilizing the old check-in time priority system. Upgrades for all levels are harder to come by this year, and will be for next year, thanks to the EQM bonus program - there are a lot more EXP's now.
IMHO, not worth the $2k for flying domestically.