I haven´t played Zoom Poker at 3 tables at the same time but I would imagine that this would be a bit stressful as you have to play all the tine and because there are no breaks between hands. Some people might even like this but if I am going to multitable I would play regular Holdem.
I prefer zoom tables because they are more dynamic + more hands to play and it's harder for opponents to adjust to you, but this is of course a matter of taste