My only complaint with Astro is that if I am trying to move or transfer a ZIP file, it instead wants to unzip it. Similar problem with APKs, it always wants to install them. Possibly there is a setting somewhere to over-ride this. I have been falling back on OI File Manager in those cases, and it's working fine.
I use Astro (free version) and think it's very good.
I haven't seen this mentioned, so I thought I'd just throw this out there: Many of the reviewer comments listed on the Astro app in the Google Market are now giving the app low ratings because apparently the reviewers have read somewhere the that the developer is no longer supporting the app. I don't see why that's a reason to rate the app poorly nor one to avoid using the app... Even if the app is at end of life, free is free, and good is good.