I mostly use the app to read threads, and it works great, for it's function.
You can visit the home page to read the articles, and browse the forums much like your computer. Also, pretty easy to make responses as well.
It's not quite as easy as the website page, but that's true for all mobile apps that try to link to a website. The format is clean, and maneuverability is intuitive. I haven't had any glitches with the app from my experience.