I was thinking of buying this addon and was wanting to know how good is the Sams?Do they get close to you before they explode?Can you use them in different missions?

                                             JOCOOL. 8)

I wouldn't bother, the SAMs never get you (or get close), if you jink at 2 miles out the will missby aroung a half mile at least. If you are after carrier ops then there is a freeware John C. Stennis that kicks the Enterprise's ass. As Will said the aircraft aint up to much, and the lack of a weapons guidance system makes the missiles useless.
I'd recomend you d/l the Stennis and convert some FS2k or 2K2* aircraft to CFS2. All you need to do is add the defauld Dp file and replace the sounds or install new sounds.

* will not work with Gmax or FSDS2.

I'd recomend Rick Salasa's A-6 (the old one) available here and Dino Cattaneo's F-14s. The F-14 has one of the best VCs I've ever seen and has the power to take off along the length of the cats without and modifications or Slew, the A-6 however will require you to release breaks while sitting on the stern.