Completely depends on your cube. I tried it for a bit and it actually got too oppressive when combined with cheap spells. It's so crushing to counter say, a planeswalker ultimate, and can even make some turns for aggro/tempo really awkward. Counter your equip cost or something so you can't do that and play the haste guy in your hand, then block and unsummon another guy, returning husher; your unsummon just became a weird
time warp and it only gets worse when you have mana to cast real kill spells in the same turn. Eventually I cut out enough cheap tempo cards that it got played less and less and was eventually cut.
TL;DR It's slow but lets you durdle hard. Having a free chump can be really annoying for some decks.