The expression 'second to none' literally means that something is the best in its class. This phrase comes from a Shakespeare play and is used to describe something unrivalled or which is always number one. 

1. I was desperate to get the grades necessary to be accepted into that university. Their facilities are second to none!
2. I loving coming to this restaurant for lunch. The food here really is second to none.

1. The business may not have the range or resources of their rivals, but their customer service is second to none.

1. Forward thinking and years of hard work have helped the company forge a reputation that is second to none in the manufacturing industry.