I think you might mean this: rock-it barre

There was a thread about it in March or April but my more recent postings aren't listed when I try to find them, presumably because of the recent technical problems here.

I evaluated it as best I could without actually shelling out however much it cost, which seemed like a lot to me, and the result was:

1. Too expensive

2. Maybe useful for somebody for something, but probably not for someone who can already play the guitar.

As a better alternative, I suggested a pedal-steel guitar with maybe more pedals and knee-levers as usual. Also not cheap, but within the reasonable range of prices for instruments.

It's basically a slide with a mechanism for making it possible to fret one fret up or down on one or two strings. It requires tuning the guitar in a non-standard tuning and having one position (and voicing) for any given chord.

I think the proportion of good idea to hype is not too good.

Hope this helps.

Laurence Finston