most people will say frame rigidity and weight are the biggest cons to the vert. thats pretty much true. they will hold up to drifting, plenty of guys on the nico convertible forums do it. the biggest pro is open roof drifting, i've heard its pretty fun never really got into it with my car though.

over all i say do it man. i love my drop top to death. just make sure the top is healthy or you budget in replacing/maintaining it.