I know my dad tipped Pilar but I have no idea how much-sorry!
Chair Sashes - if you want your chair sashes back-you have to tell Pilar-otherwise she will try to keep them...lol. Since we were using them for our reception back in Houston-we had to ge them back. I know my mom still has them. I'll ask her what she's planning on doing with them or if she doesn't mind getting rid of them.
Waiters - slow at the beginning. They had wine on hand for the dinner-but when it came to the reception after that-they definitely could have been faster. My husband said something to them about keeping the drinks full and that seemed to help. If you are worried about it-talk to Pilar and see if she can have an extra person working the wedding.
Hotel Transfer - Both ways are included - from the airport and back. Since we were staying in Playa-they even took us to our second hotel instead of back to the airport. I'm not sure about adding the extra guests to the car. It's a big SUV-so I don't have any doubt you could fit 2 more people in there. I would just ask Pilar or Ana if it's ok first so they don't charge you for it.