I just enter my max right away. Its to hard to use their increment system and frankly I don't trust them to bid properly. Never had any issues with them or any AH doing it this way.
Will have to say they slept on a lot of cards that have increased by nearly double that are still in their buy it now section. Was happy to pull a 2007 SP Rookie Edition 61 Kevin Durant RC PSA 10 and a 1992 Topps Shaq RC PSA 10 for a very very reasonable price to add to my case for shows