The team at verifica was very helpful in answering my questions, they were great with working around me being out of town during their sales call as well! I would highly recommend them for any size business using an autoresponder list or mailing services like Mailchimp/Aweber etc.. They can get complicated but it's worth looking into how simple something could be made just by switching providers if that makes sense? Not much not really anything dislike about this product so far however we will see what happens once more people start signing up from our website which has been going extremely smoothly!! We are solving two problems here 1) keeping track 2ndly having someone verify contacts who may have added themselves through different ways such us social media websites ect... This helps make sure all contact information stays updated because otherwise there might still end users adding addresses via other means without ever checking again after verifying initially.