I got this bag for my last trip, and it worked perfectly! Its roomy and can expand or cinch down to a smaller size due to the straps around the edges. Heavy duty wheels make walking through the airport with a 70 lb bag no problem. Really like how it has a grab handle on the edge near the center, and also near the nose for walking with the wheels. Also has a cool shoulder strap system that attaches up towards the front.
I was able to fit all this in the bag:
6'6" Chilli Faded (in its own day use bag with rails lined with foam)
6'0" Pyzel Phantom (in its own day use bag with rails lined with foam)
5'8" Slingshot Kitesurf board
Ride Engine kitesurfing Harness
12m Kite
9m Kite
1 Kite bag
Surf booties
4/3 wetsuit
It was at full capacity and took a while to get it all fitting, but worked great. This could easily fit 4 boards if I didn't have the kite gear, and especially if I didn't have each bag in its own individual day bag.
Overall great quality bag as well. Seems to be built well and to last. Good foam padding all the way around. I like that its all black, not too flashy when traveling.