I have had a few good sails on the 120 now and am really enjoying it.
First time was at Flat top Woolgoolga in an light n/e in about 3-4ft smooth soft waves and a bit smaller the next day.
Nice bottom turns and still turns really well for a board this size. I also found it particularly forgiving on a few late smacks with the board pivoting well as long as nose vert enough.
On Thurs at Wanda, Sydney I sailed 10-20kt N/E in 3-5ft bumpy and somewhat heavier waves with closeout sections(several sails and one mast broken, not mine thankfully).
It was very light at times going out through the break, the extra litres made it amazingly easy getting out, you could just stop, wait, go abit more, stop, wait, punch over waves and out you are!
On the waves, the board is particularly smooth, considering it's size and the bumpy waves, with plenty of drive and good off the top.
As far as planning goes,it jumps onto the plane quickly but not as snappy as the 99lt due to the extra weight and fins, as a quad you can def feel more drag as you are going along(comp to my 99twin) but it points upwind very well(using supplied fins) .
In the bottom turns the quads feel very solid, you can turn hard with confidence and trust that it will not skip out.
I have only used it briefly as a twin at Woolgoolga when the wind dropped.
I am thinking of getting some bigger twin fins(maybe 180's) for the smaller wave days to use the board as a twin to loose the extra drag and maybe plane a bit earlier,and use it as a quad on the bigger wave days when the wind is light.
Fin boxes are the dual allen key boxes, jury still out on these, don't look that solid but have held up ok so far.
I think that James has improved his shapes(even more) in the bit over a year since I got the 99lt after riding this board.
For all those bigger guys, don't hold back on getting a bigger board, the new shapes turn and handle great(note* you may cop some sh1t from the lightweights

). As a bonus extra, the kids can learn on it too as my young bloke did up at Woopi

.