A slightly different slant - I tried the app on my iPad.

1) It's way too small on my iPad. Even at 2x resolution, everything just looks far too jaggy. OTOH I can use the SPG app on my iPad just fine (even though it too is a bit jaggy).

2) The double ad thing takes up too much real estate on an already too-small screen.

3) The way the ads flip is kind of annoying too. A static ad would be much more bearable.

4) I like the way the threads just kind of keep scrolling as opposed to having to hit "next page" then wait for it to load. Having said that I'm not sure how easy / hard it would be to navigate a monster of a thread.

5) The functionality of tapping a response and posting in general is good. I particularly like the easy access to smilies.

6) Broadly speaking, for an iPad user I think there's limited gain in using the app vs just surfing in on Safari. It's not a bad app, but it's not an app which immediately offers incredible gains either. In the end I think it's just going to be personal preference that drives app use.