Although I've messed about with different tunings on the guitar, it isn't something I've really explored. I've considered buying the Spider capo for quite a while, before taking the plunge on my last Thomann's order.
Unlike most capos, it does not attach round the guitars neck, instead it fixes on the edge of the finger board with a clamp to tighten it. The manual warns that it is possible to damage the fingerboard, if you fit it incorrectly- which made me a wary of using it on a casual basis i have to admit.
The capo is made of plastic,with felt pads to protect the finger board. The tightening clamp section is made of metal. The capo is able to hold down individual notes, by a series of plastic arms that swing down pressing on each string. It is necessary to adjust these arms as the string spacing changes along the neck.
I found it rather awkward to fit and quite often lost patience with it. Once attached it opens up a wealth of different tunings, a lot that would not be possible normally. There are suggestions provided, to get you started.
Unfortunately I do not have the talent to fully exploit the possibilities and for the time being it is just a novelty I sometimes mess about with. I also have the 'glove'attachments, which allow open strings to be played as harmonics, unfortunately I seem to be misplaced them, but I think that they would more in line with what I'm looking for.
At some point I will sent a guitar up especially for the Spider capo and will concentrate on learning to use it properly, at the moment it isn't much use for casual use.