From a purely critical standpoint there are a few drawbacks, however. First and foremost, you cannot turn autohide on without pro. This is the largest drawback in my personal opinion, as this is something I use constantly.

That, however, does not mean that much. I still use Trillian Astra on a day-to-day basis and am overall happy with the progress they have made. I fully plan on purchasing the pro subscription once it is out of beta.

Also…
@Mike Grant: Yeah, that happens, though I have noticed that the newest build seems to reliably report status.

Not necessarily directed at mike – or anyone in articular, really – the big thing to keep in mind is that Astra *is* still in beta, so there are bugs here and there that still plague the software. Each build fixes multiple bugs, but it takes time to both remove current bugs and solve bugs that come from the fixes to the current bugs. Thus far Cerulean has been doing a pretty decent job of tackling the bugs and quirks and staying on top of them. I fully recommend Trillian to anyone who uses multiple IM protocols on a constant basis.