The price is unbeatable, their customer service team are very friendly with fast responses to questions or concerns you may have about your data supply needs! Sometimes we require more than one file per mailing list but I am not sure if this could be an issue? Otherwise it's great that they can provide multiple files as needed without extra charge - thank goodness!! They also offer free trial periods so all parties involved know what each other will need before any contracts get signed (or even discussed!). We've been using them since 2006 when our business was first started & never looked back from there because of how happy my emails got answered by everyone at OneStopData over those years. I like that they have good customer service, but also know what they're doing with their software. We've been using them for years. They are really good at what they do! Not much to dislike about this product. It's easy to use and has all of our needs met. I would highly recommend 1StopData to anyone looking for a great company to work with. We needed mailing lists for our business and they were able to provide us with many options to choose from.