I've just spent a week colour printing with the Harman Gloss FB AL paper and it's easily the best inkjet printer I've used to date and comes fairly close to traditional darkroom paper for quality. I can't report on what black & white prints are like as I still print these traditionally in the darkroom on Kentmere and Ilford FB papers.
I've used everything from Epson Premium to Hahnemuhle Rag / Permajet FB Royal and the colours, contrast and details are considerably better on the Harman, and as a bonus the paper is quite a bit cheaper than say FB Royal or RAG.
One thing that is a concern is how easily the paper marks. I print normally on both an Epson 3800 and R1800 but tried printing on a 7600 and it got scratched to hell. Also, the profiles on the Harman website, just like other paper manufacturers websites, were awful. QC was superb, every sheet was exactly the same in the box I purchased. Will be ordering more very soon.