I bought a Comp Electronics Pocket Pro because it was on sale. Some of the guys I shoot with use a PACT timer. Most guys now are buying the smaller CED7000. It costs about the same and it's a bit smaller, probably about the size of a non-folding cellphone. All of them measure times, give you splits and can do multiple functions. If you're going to link it w/a chrono, guys here have been using the CED8000.
I don't think it makes that much difference, but I like something I can clip on my belt/pocket on those days I'm training by myself.
-The only easy day was yesterday
-If you are authorized to carry a weapon, and you walk outside without it, just say this to yourself... “Baa.”