Thrifty - Thrifty @ Boston Logan

I have a passenger van rental through Thrifty Boston (Revere) for Sept. 16-19. Looking around the internet, I have become rather worried that:

1. My reservation won't be good
2. I'll be charged some extra charges post-rental.

So, should I look somewhere else, or has at least someone has an average-to-good experience with Thrifty @ Boston Logan?

I've had good experiences at Thrifty Logan, but I'm also a Blue Chip member who rents a lot.

I think Dollar and Thrifty have franchise stores in Boston.