A good jet MCC should put you in good stead for an interview sim.
If you haven't graced a decent Jet sim then a few handling and CRM issues could arise on the day and that would be bad news wouldn't it.
If you think you need an hour or so then you probably do but don't go crazy!
Not sure if it's still there but European at Bournemouth had a great
737-200 sim reasonably cheap. Throwing that at a few raw data's and around a few holds will do nothing but good.
I completed my MCC with them years ago. It did me very proud.
Good luck all!