If you mean a First 30E: I owned one for two years. I'd recommend it as a nice handling, well built performance daysailer suitable for one couple overnighting.
My caveats are: our three cabin configuration had too many bunks (for seven I recall) all too small for a man let alone a couple. The two hatches provide no ventilation, and with three cabins squeezed into 30 feet is claustophobic below. The steel keel is a pain to maintain until some owner does a good strip/4-8 coats of epoxy/fairing job. The boat cannot race to its rating in light to moderate air as the rig is too short, it is particularily sloooooooooow downwind due to the hankerchief that serves as a spinnaker. It goes very well in a good breeze, and is very capable in heavy air, we got ours to 10.5 knots once...
(FWIW, the C&C 30 I owned for SIX years was a much better cruising and racing boat, as would be a Tartan 30...take a look at http://web.mac.com/bicgreen1/iWeb/Site/Home.html