Having completed a MCC at European on their 737-200, I second Merritt as I was really impressed with the setup there.
The instructors are top notch, really dedicated and they give you that "airline feel" that makes things closer to real airline operations.
I got employment since then and the 737-200 surely was a very valuable experience.
The last day is conducted as LOFT (Line oriented flight training) and this is very close to what the airlines want you to do during an assessment.
Some will do very expensive MCCs on full Efis aircraft (i.e. 737NG / A320) but I think European gives you all you need to pass an assessment. Well then that's up to you and your finances, but a full-motion 737 MCC for such low prices, in an airline environment, this is a great opportunity I think.
I haven't been asked to write anything on here, but they surely deserve some positive feedback.
The sim is old as said before, but it works fine, no problem whatsoever for me or my friends who did their MCC there as well.
If you are tight on money, save the money from an expensive MCC, and use that when you are called for an assessment to buy a few hours on type (in a sim). That is probably much more valuable than buying 40 hrs on a 737-400 MCC/JOC and not doing any sim time before an assessment.
Just my two cents...
By the way, as I booked my MCC in advance (last winter), they had the sim available on that day and offered me one hour in to see what it was like.
Some of my friends got a chance to have a go on the 747-200 as well (for free).
Here's what the 737-200 looks like:
