Better than a lot of the ham/hobby stuff. I haven't worked with those in particular, but it looks like the coax is fully exposed. Might not last as long as the more expensive antennas, but that's the trade off with the lower price.
What's your RF environment like? Are you in the relative center of the things you want to listen to, or are they generally in one direction away from you?
Reason I ask is because depending on how you orient the bays on that antenna, it'll change your performance. If you point them in one direction, it makes it slightly directional and gives you some more gain (6dB is their claim, it's probably more like 3 to 6dBd depending on the spacing from the mast).
If you are in the center of what you want to listen to, then you'll put the bays on opposite sides of the mast and you'll get a more omni directional pattern but only 1/2 the gain.
You may not need lots of gain for what you are doing. A single dipole might give you some more flexibility, and adding a preamp at the antenna may give you the additional gain you desire. I really like the Telewave ANT150d. It'll cost you more, and probably not necessary for what you are doing, but a single dipole might be all you need. Easier to install, easier to adjust the pattern.