Recs.
Updated
SpecsUpdate
Pros
Pro Small, but not at the expense of features
Most small distributions lack feature-rich and heavy applications, but not Bunsenlabs. Bunsenlabs saves resources solely thanks to the DE, and brings all the feature heavy software you can wish. The Bunsenlabs desktop is a pre-configured Openbox desktop, witch needs a bit of time to get in to it, but after a short learning curve, it's a very useful, extremly lightweight, highly customizable desktop that is fun to use.
Pro Easy to install and use
The base system is Debian, but the distro comes with proprietary drivers pre-installed, which makes Bunsenlabs very straightforward to install and to use even for newbies. This makes Bunsenlabs half part realy geeky (the desktop) and halfpart very noob-friendly (install and maintanance) - which is a very strange, but damn good workling combination.
Cons
Con Just a polished distro of Crunchbang
Crunchbang has been dead since 2013. Bunsenlab and Cruchbang++ were released after it's end. If you want to enjoy old Crunchbag, you may give a shot to Crunchbang++. Cruchbang++ is a clone of old Crunchbang but BunsenLabs is just a polished distro of old Crunchbang.