Cablesmiths

This is by far one of the best apps we have ever used with out of the box features that are easy to understand and configure. Our theme is quite custom so some features on apps were not working as expected but the customer support is excellent they are very responsive and in our opinion better than some dedicated web developers

They force you to make it live on your website before you can fully test and understand their interface. Once you install you realise you pay for everything including some "enhancements" ranging from $5-10 that to me are standard features that make it useable. Don't force making it live from the get go before the customer can fully understand your product and be transparent about your prices and you might have something