I have one of these as well (mine is a different but similar model - GL-AR750S-EXT). But I don't travel often enough, I guess. Because every time I go to use it, it's a struggle to get it to work and I typically just give up.

Last weekend I stayed at a Hyatt, and the first thing I did when I got to the room was power it up. But I couldn't for the life of me get the captive portal page to load when I was connected through it. It worked fine connected directly to the hotel's wifi, but through the router - nothing. So I gave up. It wasn't worth the hassle.