So after using it for a while, a couple of comments/suggestions. Keep in mind I never used tapatalk so these might just be things with the basic app to begin with:
1) The only way to go "back" is to hit the back button on the phone itself. It would be nice if you could navigate around by hitting the buttons at the top. So if I go into a forum, like general discussion, then want to go back to the forum list, I hit back. If I go into a thread and want to go back to the forum or forum list I hit back twice. It would be nice to be able to tap the "Forum" button at the top and go right back to either the forum you were in previously or the main forum list. Sometimes, not sure how as I am too lazy to test it out much, I hit back on my phone and it just closes the app entirely. Seems like it happens when I am in a thread and hit back to get back to the forum, then the app closes.
2) Freezes up occasionally on start-up. A phone/tablet reboot gets it going again, but once it hangs up, it will not load until you reboot the phone or tablet. I have a Galaxy Tab 8.9 running ICS and Galaxy S3 running JB.
3) I know this has been discussed but it would be nice to be able to rep from the app.
4) I really like the app on my tablet. Looks almost like the website and is easy to navigate around in for the most part.
5) Too many porn ads.
All in all, it's cool and I like it, but it won't be replacing the computer any time soon.