Anyone tried the positive paper from Freestyle?

http://www.apug.org/forums/forum37/49372-efkes-direct-positive-paper.html
http://www.apug.org/forums/forum37/52866-efkes-direct-positive-paper.html

Yes.
Effective speed is about 2 or 3.
A soft working developer is necessary, in other words a film developer works better with it than paper developers.

See this link (http://www.f295.org/Pinholeforum/forum/Blah.pl?b-lab/m-1207951805/)on F295 about the same paper. I've done some simple portraits with it, using an improvised binocular lens mounted to a nested box camera. I found it needs a considerable amount of preflash to help get good tonal range; on the order of ~3x the amount of preflash I normally give my grade 2 paper negatives to control contrast. See the links attached to that post.

~Joe