Look... It's not a toy. But it can restore the computer completely in less than 30 seconds... No sign of trouble going to an old snapshot!
It does what it promises: your computer travel back in time.
It had a very difficult beta phase (crashes, BSODS, loosing data).
It uses the same engine (licensed) of other snapshot/recovery tools (like RollBack). But it is free.
It has a lot of features and worked like a charm in my Windows 7 computer: scheduling, managing snapshots, etc.
Some drawbacks: you "need" to use their internal defragmentation tool (not a 3rd party), you won't be able to run avast at boot time (but if you get infected, you can restore your system completely), image/backup tools needs attention to copy sector-by-sector.
You could have trouble if you have a multi boot (Linux & Windows) boot.
They're improving significantly the way CTM works... I've disabled the non-reliable System Restore from Windows and I'm using CTM now.
Well, I'll translate it to my language also