I would definitely use it. The website is simply not constructed for minibrowser use.
Ps: the category system has been f***ed up for months now. It automatically shifts your question into sexual if there's like a key word or something. Now that I think about it, its probably best that they don't have an app. I mean this sites been running for years and its still a bit of a patch job here and there.
I voted D, meaning occasionally if I was on a work trip or something, it might come in handy. If the site could be made compatible with Tapatalk, that could be great (it's software with open APIs that allow the app to hook into a web forum).
Having said that, I prefer to use my PC as much as possible. No mobile device is going to compare to a 24" monitor and a full-sized keyboard.
I'm fine with using the internet on my phone to use this site. No need for an app. Plus, I tend to only use my computer when using this site because it's easier and faster to type on a keyboard than on a phone.