Guitar gadgets is, to put it in a nutshell, a neat idea well executed. A collection of several guitar pedals, sound wise mostly on the wild side, with nice graphics and some introductory lines what the chosen pedal does and maybe how to use it.
The quality and practical usability of the effects varies, though, the flanger is great, the cassette tape emulation fun, the reverb special, but the delay and slicer (SlicR in today's web speak) don't really appeal to me. This may be personal though, and others may find use for them. Apart from that, there are eleven pedals and the plugin is free, so no real criticism here.
Usability is good, as with most real world pedals there are only few knobs to tweak, plus there's the input gain which can change the way some pedals work, and an output gain to control the havoc. One could argue whether the nice pictures and text are too gimmicky and instead rather have the possibility to chain the pedals (that would be cool indeed), but nevertheless it is a nifty little plugin for all experimentally oriented guitar players and other weirdos.