I've been contributing to my Taab account for a few months and love it! I usually feel somewhat guilty when I book a trip for myself, but setting money aside monthly through Taab definitely takes some of that feeling away. Plus, it feels like you're booking everything for half off, which is tough to beat.
I fly a lot, but I'm not rich. Why is it so difficult to find cheap flights and why does it seem like airlines don't apply any logic to their fares at all? Hitlist has already saved me many hours of checking airfares online. I get notified whenever an interesting fare comes up for a destination that's on my wishlist. Hitlist works better for me than Hopper.