I love coming to Ken's! Service is always quick, and my manis and pedis last a long time. Plus, pricing is incredibly good (gel manicure is only $30....you can't beat that for the quality!).
They do take reservations, but you can also walk in. I've done both, and have never waited for more than 10 minutes, even on the weekend.
Two (beautifully manicured) thumbs up!! :)