i need some feedback on parties at mcdonalds restaurants

ill be about 6 weeks off being due to give birth, so the idea of a party out of the house sounds good to me!
the maccas near us has a fantastic playgroud(the old wooden type ones, not the newer plastic climbing maze type ones) its undercover, and safe for the little ones, as dd had been playing there since she was about 18 months old.

we have about 10 kids to invite, not sure how many will actually come, as 2 of those have birthdays right near dd's, so i will have to get in early with the invites

roughly how much does it cost? is it per head? do we supply the cake? has anyone had any bad experiences??

to me its seems easy enough, my brother had his 4th party there, but mum doesnt recall any of the details i need lol

i will ring or go into the maccas and discuss it with someone there, just looking for some feedback for now!

thanks ladies!!