I have picked up several of these Moleskine knock-offs on sale now at Sainsbury's. They have 96 sheets (192 pages total) made from 70% recycled material which is finished in an off-white colour. All sheets are detachable, by the look of it. The paper is ruled and looks reasonable quality; a quick test with my Pilot M90 and Parker Blue Quink showed no sign of feathering or bleedthrough, and it takes pencil well enough, too. There's even a little pocket at the back for ticket stubs, receipts, postage stamps, and other kipple. This notebook is covered in black polyurethane, which has a satin finish that picks up fingerprints and grease marks.
The best thing is that they are on sale at 75 pence each, making them less than one-tenth of the price of a Moleskine equivalent, which costs £8.99 and is certainly not ten times better than this. I suspect the low price is a close-out, so if you can get hold of one of these, give it a go.