Hi
I was divorced via the collaborative route as we wanted to keep things civil (initiated by him as there was an OW).
The big plus is that it was fast and 'amicable', the negative is that I did not come out of it as well financially as I could have - I agreed to things without getting into a fight and no-one double checked his figures, I took too much on trust and his accounting was creative. In retrospect there was no-one "fighting my corner". A friend is just completing a non-collaborative, disputed, divorce with a tough solicitor on her side but a rottweiler on his. She has had the most awful six months, looked like death warmed up - and it has cost them both a fortune (£15K+ each) but she has come out feeling she has the best deal she could get. I ended up paying £3-£4 K and that was for the simple, undisputed version - you pay for the collaborative solicitors to meet and talk things through! OTOH I know a couple who spent £150K on their divorce - which is an obscene amount of money IMO!
Would I do it again the collaborative route? yes I would - because at the end of the day it was best for the kids to see us working amicably and I have maintained great relationships with my ex-inlaws who I stay close to.
There are trade offs to be thought about, for me the key one was keeping happy healthy and sane while it was happening and to keep as many of the extended family as friends as I could. Your priorities might be different. IF money is going to be really tight you may need to sacrifice wider relationships to keep a roof over your head - luckily that was not the case for me. I will have to significantly downsize once the kids leave home, and that will be a real wrench, but I will be OK.
Keep talking to each other though - the 'errors' I did spot before the settlement were talked about, i never accused him of creative accounting, but suggested he might have made an error in his calculations....
BTW If negotiations do break down the solicitors you have for the collaborative process cannot act for you in court, nor can they be called upon as witnesses.
good luck