Who has a Yellow Watchman Goby?

[Keri]

I like the looks of these guys but don't know much about them so I have a couple of questions for the people who have them: (I've read a bunch online but I get conflicting ifo from different sites)
Are they a sand-sifting species? and if so, are they the kind that spits the sand up high closing all of your corals and clams?
Are they jumpers?
Do you think they would get along with my other fish in a 120g (scooter blenny, false percs, SF tang, Lawn mower Blenny, coral beauty, 3 chromis, yellow wrasse, foxface)
Would a 2" sandbed be deep enough for them?
edit: also: would he eat my sexy shrimp?

Thanks to everyone who answers!!