I love that they do A/B testing for me so i don't have to worry about it! They are very easy going, professional & knowledgeable staff as well which is really important when you're working with something like this where there's no room in my budget or time at all (which could be an issue). The only thing would probably need some improvement if possible was their turnaround times of getting back after submitting changes - sometimes even days can go by without hearing anything but then suddenly get updated saying "it works!". Donations made through them went straight into PayPal instead giving any real sense what percentage came out-of pocket vs paid via credit cards etc., not sure why since we were paying per click anyways? Maybe just because its been awhile now though :).
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