I've got an 8'3 Shroom, sadly we've had no real 2-3ft chop to play out on it yet. What I have been able to ride it on is 1-2ft random A frame type waves, and it's been quite a revelation.
Being quite wide I did find it a bit of a brute to paddle across the 5-600mtr channel we have to cross here to get to our sandbar, but once I'd done it a few times I got used to way it rode over the strong current/chop. Once out on the small waves I really didn't think it would pick them up, but it did.. all be it with a bit of effort to paddle onto the small waves. If the waves were 2ft'ish it would easily pick them up, below that and it was a hard paddle onto the small mushy waves, but to be honest that is what it's like on my other Sunovas.
I like the Shroom, it's designed for the soft mush we get here in the summer months. It's a super stable board, turns so quickly, short enough to step back and dig the rail then release the back foot and bring it back to the middle and glide, or surf stance anywhere on it.. it's quite funny, and a lot of fun.
I want to try the 7'6 really (the 8'3 is on test and I've had it about 8 weeks now) because I'm about 80kg I think the 7'6 would suit better, but.. and it's a big but.. the 8'3 is just a lot of fun.
Don't get too hung up on the deck shape, it's so intuitive to use. Surf it like you would any wave board in low chop/waves and it'll spin and carve a very neat turn, but you have to commit the rear foot I've found. Step back onto the rear rail and lean in hard, it'll then reward with grin inducing giggles. Leave your back foot in the centre of the board expecting it to turn and you will be disappointed, you need to make the effort.
I've got the board for another few weeks and hopefully take it out in some chunky junky waves, I'll post back once that's done.
I'd seek out STC' s videos on YouTube and also Australian Paddle Surf on Vimeo (Marty/Casso) because they have small Speeed and Shroom 7'6 vids..
link to Shroom 7'6..