I did a tandem jump at Hibaldstow in May 2010 and then immediately worked my way through AFF. Since then I've been progressively trying to get less crap at FS / RW stuff...
I find the instructors and staff to be approachable and friendly. It's particularly good for walk up FS load organising, I can be pretty sure that I can turn up unannounced on a weekend and there will be some cool formation organising going on that I can join in.
They are very keen to get you in the air, so even on mostly poor weather days, you can be sure that if there are any gaps in the weather that are safely jumpable, there will be a lift going up.
The facilities are good, with a large packing shed, covered dirt dive area, and a warm bunkhouse (or free camping). Reasonable food in the Cafe, and a great bar.
If I had to pick a con, The main landing area could be wider, it's a lot longer in one direction than another, so in certain wind conditions, you can have a narrow-ish strip of grass to try to land on, with fields of crops / muddy ploughed fields at either side if you under/over shoot. It's a good incentive to practice a decent landing pattern though!