I switched to Connex Credit Union back in September. Was not thrilled about about the M&T acquisition, and frankly, most big banks could do a lot better for their customers...

With that said, a lot of Credit Unions are smaller operations. Their hours and locations aren't always convenient, but you generally do get a more personal touch when you do walk in or call and talk to someone. You're definitely less of a "barcode/account no." than you would be at Bank of America or something.
If you're looking to buy a house than you should defiently ask whatever Credit Union you go with about rates...most of them can give their members (customers) killer rates on loans and mortgages.