unlike aterm, it's slow, and has no shading.
But the size difference is well worth it.
edit: i always think tc should make a good first impression. no matter how minimal it is, it should be better than any other minimal experience. it's important that tc is tiny, and it's better that it be as tiny as possible, depending on the criteria used to make it tiny. but it amazes me that anyone would say "the change in size is well worth it" when the change in quality is larger than the change in size. (and even the change in size is almost none.)
basically, i would never compare tc to other distributions this way: "it sucks, but the change in size is worth it." that's not what tc is like.
i would say: "tc is incredibly small, but it's also an awesome experience." in many events, the smaller footprint helps to make it awesome (i don't believe that applies to rxvt either, except in rare cases where it should be added to tc and used instead of aterm.)
until now every change in size seems to follow the latter logic, not the former. size is a factor, but quality is important. if there's going to be a change in quality, the decrease in size should be greater than the one in quality. a switch to rxvt (however final) does not fit that. but thank you (very) much for adding qemu, and everything else you've (most often) done to make tc the most excellent distro. it is, but tcb is lessened by this- mostly in quality, slightly in size.