I bought most WA products as soon as they were released but now refuse to buy any further products until video tutorials are available that walk you through the 'simple' process. For example, I have Powerstore and PowerCMS but full visual info on how to get them to work is scarce. I've said previously I would pay for these tutorials provided they talk you through them fully and don't vaguely state things like 'now all you need to do is set up your database and configure it' before moving on!
I own Ecart 4 but wouldn't dream of upgrading to version 5 despite them stating 'No database knowledge required'. I'm not falling for that one again ! The same applies for 'Powergallery'. It looks good but I won't buy it until I see how to implement it easily and fully.
So, I reckon your services are required to produce complete and full tutorials for WA because it doesn't look like they will ever do this.