Make sure you are not locked into a contract or service that penalizes you for exceeding a transaction limit. A service that makes it easy for you to scale up is preferable. Performance is determined by the time it takes to complete transactions. Reliability refers to the number of transactions that go through compared with those that fail. See what the service claims for performance and reliability, then talk to some of the firm's customers to check if the service lives up to its claims.
Some services essentially act as resellers for banks.
Make sure the service you choose has a relationship with you, so it will help you resolve problems directly. If you want your banners to sell better, visit BannerTips. Save time and effort when you have to create your next banner. If its time to start selling products on your Web site, award-winning FREE MerchantWorks tools and info can help you get there fast. MerchantWorkz articles and resources will help you to better understand how credit card merchant accounts work, what to look out for, and places to go for more information.