Clear PCB Etchant

[Keith Winstanley]

I am about to buy some more ferric chloride for some major etching but I am 
wondering if I should try this clear, odourless etchant that is being sold these -

days.Doing large boards with FC takes ages as I don't have a bubble tank and 
this clear stuff claims etching time of 6 to 8 mins at 40-45 degrees.
As I am about to etch an MS20 main board I would like something a bit more 
speedy.
Anyone used this clear stuff? How does it compare?

cheers...

Keith Winstanley
http://dspace.dial.pipex.com/town/street/sl67/