-Nice accuracy and range (espically with small bore paint). You'll be a killer on the speedball field.
-Looks cool. (People see it on your gun and say "WHAT THE HELL IS THAT!?!?")
-Light weight (won't make a small gun topheavy.)
-Can take a fairly good beating without bending or warping like some aluminium barrels do.
-VERY quiet espically with the right gun and bolt. They won't know what hit em!
-The price. Shop around and you'll probably be able to pick one up for $60 at the least. I got mine on Ebay for $55.
-Hates crappy paint. If you use bad paint a lot then this barrel isn't for you. Hellfire works EXTREMELY well with it (when I've got the money for Hellfire) but normally I use PMI. PMI balls seem to work rather good with this barrel, though. Haven had a ball break yet out of 200 rounds of PMI.
-Dear God is this thing can be tricky to clean! Once you get used to cleaning it in game its not a problem. You just have to learn how to since you have to go about cleaning it a little differently than most barrels.
-I don't know whats up with this, but sometimes the barrel becomes a little loose after long play. Not really a problem though. Just check your marker before each game (like you should be doing anyway!)
If you can get one for cheap, go for it. $90 is a little high for one, though. If you can, try to get the 14" rather than the 16". Longer doesn't necessairly mean better.
Overall its a great barrel. I've heard a lot of people complain about these barrels not working well with Spyders. Guess what? I've got a Compact 2000 and a Spyder 2000 and it works well on both of them. I even put it on my friend's Shutter (which I think sucks as a marker) with the same results. Perhaps its the crappy Spyder stock bolts breaking the balls and not the barrel itself.
Overall, this is one of the best barrels you can buy for sneaking arond in brush and picking off people. DYE's are nice but too loud for this sort of play (not to mention a lot more expensive). I don't know how it shoots in cold weather as compared to a J&J ceramic although at normal temps it shoots about the same but quieter.