I'll demo all of their pedals, but here's the first couple of videos focussing on the most popular models, the Microtubes B3K & B7K. Personally, as a songwriter and guitarist, I only really play bass when I'm trying to write parts for a song - usually on a cheap but effective Spector Performer series 5-string I have at home. So, for me - the B7K is the most appealing because it can function well in two ways, on a board in front of an amp AND as a direct recording tool for studio use.
There's nothing wrong with recording a bass direct via a DI box, usually you get a good acceptable result and not much can wrong there. The B7K gives you an affordable compact way to stick with the convenience of recording direct, but gives you the basic controls most players would rather have than not. The EQ is very useful, offering low, mid, high-mid and high controls. The overdrive is what Darkglass are really known for, an excellent range of saturation and no big negative impact on your clarity.
Australians, check out the range and please support me in being able to explore new brands, and make videos as much as possible by purchasing from Guitar Factory - http://www.guitarfactory.com.au/Pedals_FX/Darkglass-Electronics/