C.BUTTON  Absolutely horrendous piece of software. Firstly the small-time developers behind it make you jump through far too many hoops to get a download for what is after all free software, then it's been so poorly coded that it's useless for the purpose it was designed for.

Macs have been using dual processors for some time now, yet this app which could *really* benefit from being multi-threaded still only uses one. Nearly every other decompressions app out there is multi-threaded and sees huge performance benefits, but this doesn't and as a result takes forever to compress/decompress large files. Not that it'll take the millions of hours the poorly coded estimate will give you (if you even get one, on multi file archives it rushes to 100% after one file then stays there for ever....), but it's just plain slow.

Back in the days of OS 7/8/9 this app was a must. With the advent of the built-in zip compression of OS X this is a vestige best left to the past. Yes, it creates files a few percent smaller than a zip, but then it takes forever for the person you send files to to find the decompresser and install it, assuming they even know where to look. For compressions stick with the Finder's .zip, and for decompressions use The Unarchiver. Both are free and much, much better than this legacy, proprietary lump of slow, buggy bloatware. Sorry Allume, you used to be cool but now you just suck.  
(Version 11.0.2)