Not bad but not great either. Considering it took you 5 minutes to design I think you could do alot better :) the ballistas caused a problem at first and I could see my trebuchets were going to be destroyed pretty quickly if I tried using siege equipment. I always start off with a balance of engineers, archers, crossbowmen, swordsmen, macemen and a few laddermen. The double crenulated walls meant you couldnt use ladders, damn! ... or siege tower. I spotted your one major weakness however, which was the hill just east (?) of the castle, which I sited my 40 crossbows upon, who then proceeded to kill everyone in the rounded towers and the defence tower at the end with no losses. This left one ballista, about 10 archers on the first wall, and the other archers in the remaining tower. I set up 2 trebuchets to destroy the final tower, with plenty of shields to cause distraction for your ballista. Once done, the macemen just battered the walls to get through with the swordsmen - this is where i got my losses. The archers came down with the wall and were battered too :) Proceeding to the second wall, the same, but I sent in archers to finish those standing on the ground from the tower, and they also killed the lord, so I didnt get to fight your swordsmen. My suggestion? Put archers on the keep as a last defence, and find a way to stop your ballistas being destroyed from my hill. Great stuff though, its fun. The castle doesn't look all that realistic which detracts from the experience slightly... but not bad overall.