I love this board. I got it 2nd hand from Lockedin (swaylocks poster), he's ridden it much more than me, in a much wider variety of surf. I've only had it since summer, but have really come to enjoy surfing it. It catches waves great, turns easily for a longboard, and is great fun to ride.
I'm not really a longboarder per se, so take that into consideration when I say I paddled it out at SLO into some overhead grinding surf, and just got hammered. I couldn't handle all that length (9'6") on the ledgy, vertical takeoffs. I'm sure a good longboarder could, but I am much more comfortable on a 6-8 to 7-4 length board for those conditions. The Walden was the only board I took that trip, so I had to paddle out, but didn't get any rides that day, just some epic wipeouts LOL.
But I've had it in good surf up to 6', Topanga, Malibu and area, South Jetty, C-st. Vta. and Stables, and it was a blast, fun fast and maneuverable.
Mine weighs 20 lbs., as it was rebuilt after being broken in two. This is the GSI version, which is a veneer over eps I think. The foam has big granules. The epoxy finish is brittle, and "chips" unlike any other board I've ever had. But the composite veneer itself is very strong, it takes a lot to ding it to the point it would take in water. It is stringerless, which may have contributed to its breaking in two. It was rebuilt with wood, so its a lot stiffer now.
There's a youtube video on it, and it surfs just like it shows in the video.
http://www.youtube.com/watch?v=IbcMDkmFvM8
Like I say, Lockedin knows more about it than me, I'm sure he's a much better longboarder than I am! Oh yeah, and I'm not a noserider, either. I mean I do walk the board, and ride forward when trimming sometimes, but not a hang ten kinda surfer. Hope this helps.