Don't forget the total cost of the TRSS. You are not paid until you've finished your training (no expenses either).
23000 Payment to eJ at start of training
2500 All your fixed costs (rent etc) while you're not paid
1200 Interest on loan while you're not paid
1000 Travel while you're not paid (no expenses for first 3 months)
2500 Relocation to some random base hundreds of miles from home, possibly in a different country
300 Uniform
That's more than £30,000. Some TRSS guys also had bonds they were paying off in addition! You will train beside others who may be weaker pilots than you, but who will be paid from the word go and get the rating for free.
Having paid all of this, you will be on the same salary as everyone else.
Also, your salary is docked 10% for the first 6 months and you can't get staff travel just when you need it!
BUT eJ is the only quick way onto the LHS of a jet, so it is worth it IF and ONLY IF you have a spare £30K you're willing to write off.
The rostering is exactly as Sir Donald describes it. I had one day changed 4 times before I flew it!! But I would disagree about the recruitment people - I found them to be pretty thorough and professional throughout.