So you have two opinions:

1. A big firm is good.
2. A small firm is good.

I bet we could get even more opinions:
1. A big firm is really bad
2. A small firm is really bad.

Maybe we could take a poll. But remember these are opinions. You know your own comfort level. You know if you like to shop at a small mom and pop store with more personal attention or a big box store and get no help until you get to the checkout. Both can deliver a good product. Both can be a bad deal.