Printing Options???

Hey all, I was wondering if someone could tell me their preferences on
places to get prints.

I know Walmart and Costco do them (how's the quality?), but was wondering
about other options too. I know I've read of other places on the web. Any
recommendations (I'm in S.E. Pa. if it matters)?

Do they all use the same machines or is that something to be aware of?

Also, do the machines know to print in landscape or portrait or do you
specify for each pic?

Thanks.