The best part of this app for me personally was their customer service team! They were always quick to respond, knowledgeable about our account needs/issues (and they made it easy), helpful with suggestions or ideas when we needed them - even if I didn't know what exactly my issue might be yet :) We had no issues at all while using Visx so far but since there's been some changes lately regarding ad inventory availability etc., things could change quickly from now until then...
So keep an eye out as well because sometimes you can get stuck without any options available due to low supply vs demand ratio. Try comparing rates before deciding which network will work better depending on your budget and target audience size / demographics. It helps us reach more people who are interested in specific products by giving visibility through various channels like social networks, search engines & mobile apps.