Not bad as a bank, but a bit behind in terms of technology
I have been banking with Nationwide for about 4 years now. Never had any major problems with them. They have reasonable interest rates on their savings accounts, and fees abroad have been one of the best.
Internet banking is not bad, especially with the new design and functionality. A couple of bad points though - firstly, when you look at your account activity as a graph, it doesn't take your overall balance (including savings account) which is a bit useless to be honest. Also, mobile banking is shocking compared to the level offered by other banks.
To reply as a company, please log in to your business account.