Just for kicks I went to the advanced search feature and entered "Tapatalk" into the query box. My search returned 110 PAGES where this term appeared in a post, most where an individual used the application to post a response to the site. I have provided a link to the search below, you can contact as many of the members using the application as you want to solicit their feedback.
I use it for this forum and a couple others. Works well. If you stay logged in all the time though and create a bookmark of AS on you iphone it works just as well and is free.
I have it as well, I don't post much with it during the day and use the computer at night but it's nice to be able to open it up quick and check the various forums I like to keep up with.
I have it on my Tablet. Works pretty well! I don't use it on my iphone. It was free and I like how it notifies me of everything I want to be notified of. LOL I just need to figure out how to get it to quit the whole sent from my tapatalk nonsense. I would rather it said something catchy like, " Sent from a professional sloping back cut faller"