We flew EasyJet last March roundtrip between GVA and DTM. They will weight the bags you check in. They will charge you for extra weight. As for carryons, you should be ok with a camera bag and a piece of carry-on luggage. I carried a tennis bag and a carry-on and they were fine with it.

The only pain about Easyjet is that they seat passengers in the same cattlecar fashion as Southwest. Still if you have gotten a great fare, it's worth it. The flights themselves were quite pleasant.