Last week I rode a ancient monty x-lite with a seat and could do more fun stuff on that than on my old echo. ie, spins, bunnyhops and could sidehop a wall higher than what i could do on the echo. Seats arent bad there great apart from when your feet slip of cheap pedals (that hurts the children) but all in all they are there for a reason. You wouldnt expect to see a downhill bike without a seat. But yeah for modern trials, seats are kinda pointless.