I have a Zodiac Cadet 2.85m and it's a superb little SIB. We bought it in 2009 and so far it has done six seasons.
We have used it in Scotland, in Cornwall, on the canal, the Norfolk Broads, River Dee in Chester, and Windermere.
The boat has been in and out of the bag over fifty times, and it has never had any faults.
It still looks like new.
The sectioned solid floor takes a few minutes to assemble and the air keel means it handles well at speeds up to 20mph.
The transom is wooden but seems very solid and after the engine has been on and off over fifty times there is no visible wear (there is an alloy plate on the inside where the engine clamps sit)
Overall l would thoroughly recommend this boat, and would buy another tomorrow.