They are very knowledgeable about their products they sell! I have never had any issues with them at all-they always do what is promised (and more!). The only con would be that you can't get things shipped out quickly enough sometimes if it's an urgent issue or need - but other than this there really isn’t anything negative we could think of as far as our experience goes so no complaints here either!! We use these guys because everyone else just doesn;' know how important customer service/reliability truly IS when selling equipment like ours.