The warmups were intense and I can't remember the last time I did so many squats (150, + ~150 pushups and situps - i didn't do the full set, but came close). The adults were essentially two groups the 'masters' like 2-3 guys in their 40's and the 'seniors' me, the asistant sensei and another brown belt in his 20's. Being that I usually play guys in their 30's and 40's the young bucks gave me a run for my money. Also, Randori was harder, because I am not used to that type of game - fast and ready reflexes. Leo (the asistant sensei) was throwing me as fast as I could stand up, and even my venerable throws and counters weren't working.
For the first time, I also used a crash pad. For those who've never seen one, a crash pad is a very think foam pad (6-8" thick) used for Nage-Komi, throw practice. In my dojo we do our Nagekomi on the mats, and I have never used the crash pad before. My throws all sucked because I couldn't get my positioning right for the pad. I nearly hurt someone with a failed Kata Guruma.
In ne-waza I also went up against Leo (the asistant sensei, and he choked me out everytime (save one armbar). I also injured my hand fighting the triangle. (I hope it's playable,but I will know later).
I would definitely go there again, wife permitting, but I think I will need to get into better shape to keep up with the young bucks :).