As for me, in my co is a bit tedious... It takes one whole week (monday to friday 9am to 6pm) once a year... We review a few systems every year and also we have a few lessons on dangerous goods, hi-jack, performances, weather, regulations, CRM, operational safety (where we review the figures taken from FOQUA on the last semester) and Emergency (how many people fit in a life raft? what does a halon fire ext. look like, etc...).
Honestly, the systems part which is done on a computer with a CBT , and then a quiz of each system, is ok as far as you haven't opened the books recently... The rest, is ticking the box, although you maight find something intresting out of all those five days...
I don't mind doing it... specially on Monday, but on wednesday I'm quite bored already and then on friday i'm totally depressed... it feels like working in an office...
Bye