I like resurrecting old threads...
I have a few ES3xx models including a 333, and initially after getting it I had mixed feelings on the 333.
On the slightly negative side it did not "feel" like any of my Gibson 3xx gits, it's lighter, the neck is thinner and the frets are narrower, it just,"felt" different. It REALLY needed a pick guard for me to start to get comfortable using it because I often anchor my right hand on the PG. I also did not like the satin finish on back of the neck, and after buffing the back of the neck and adding the PG it went a long way to getting it to feel right. I also buffed the rear just to see what it looked like buffed out a bit... it's OK but I don't know if I'd go through the trouble of stripping everything off the top just to shine it up.
The original pups are a good alternate voice away from the 57's, BB's, and patent number pups in my other Gibsons, it balances exactly like my others, a bit body heavy. I play all of my Gibson semis with a strap standing or sitting and that fixes that. As an added benefit of the 333, it has that access plate in the rear... I'm not a "modder" but one day I may fool around installing some of the many pickups I've acquired over the years in it.
Overall, if I couldn't have a 335, 345, 347, or 355 I'd have a 333 any day and definitely over a 335 studio because I prefer white binding and I like the simple gold "Gibson" logo on the head. The 333's are real sleepers and a good buy compared to the 335 studio and (IMO) better looking.