LOL at the old man-ish "if you can do it the old way just fine, why bother with a new way" responses. Hey, in my day we had to walk through the snow to get to Neowin forums--up hill, both ways! While fighting off Nazis! And we liked it!
From someone who actually uses Tapatalk (the free version), I prefer it over launching the web browser. It's very fast, throws me right into a forum with very few taps and manages to feel more finger friendly than mobile skins. I don't really use it for making posts (and the free version doesn't allow that anyway), but it gives me a very quick way to keep up with a thread I might be following in case there's info that matters to me (specifically, I use it for XDA and some other Android related forums).
There is no reason not to enable it. And I admit, I've done the search for Neowin on it before, too. Was a little disappointed not to find it.