I successfully did the FR sim check a little while back. It was tough, including an asymmetric procedural ILS. There was a mix of airline experienced and inexperienced candidates. Pass rate is quite low according to my sources, so I would very much recommend brushing up in a sim before hand, and the cost was £252.
One excellent sim instructor I have used is Dan Brownie (+ 44 (0) 7947 007569, £150 per hour inc sim per crew of two) who uses the 727 sim at Bournemouth. This sim has a very similar layout and instruments to the 737-200 FR use at EMA, so was very good practice.
The training captains who took the day did put you at ease and the atmosphere was very much 'we have got loads of jobs going so you are not in competition with each other - everyone who is good enough and works well together will pass' rather than ten competing for a couple of places, best two on the day wins sort of thing.
Cheers and good luck
ssschmo