Hi and welcome,
not a fan of the week courses myself, they can work and I have done them before, but I think they're far from ideal, even though it seems to be pretty much all people want these days
For those who want to learn quicker I prefer to do 4-6 lessons per week, usually for 90min or 2 hours, spread out over a few weeks, in my experience this gives a greater success and people seem to be happy with it.
If you do decide to go down the week course route I would first make sure that you will be taking your test at your local centre and the car you learn in will be the one you use on test, I've heard of some that get the tests at short notice at any test centre within the region and can use other instructors cars if they happen to be based closer. You will also be required to pay up front so before parting with a large amount of money it may be worth booking, say, 5 hours or so first, just to make sure you get along with the instructor and are happy with their teaching.
Good luck with whatever you decide
