We used to use a tank just like that in my school, back in the eighties. It took ages to fill it up and it weighed a ton, so by banging it on the table we finished by destroying it (the table, not the tank :-). Everyone wanted to use it, for it saved us time by allowing us to develop 5 films at a time, and noone cared about even results back then.
I'd never use a tank that takes more than 10secs to fill and drain now that I've become a neurotic perfectionist, though. I'll stick to my 2 reel Jobo tank and be more patient than I was in my youth. I would advise you to do the same, for if you aren't a neurotic perfectionist you'll become one later in your life ;-)