IMO, the problem with most tilt back designs is, given that midrange and treble response is directional and bass is not, these are really only useful for near field personal monitoring, and result in a bit of boomy mush reaching both the audience and other band members on stage.
So, the only time they would be useful (IMO) is in a situation where you had both front of house support, and a good enough monitoring system so the rest of the band can hear the full range of your instrument across a large stage. Of course, if the monitoring system is that good and you have your own mix, then you wouldn't really need a backline rig.
IMO and IME with these designs. I find that for small cabs, like a 112 or 210, attaching a spring loaded metal handle to the front of the bottom of the cab provides just enough tilt to hear a bit more midrange and definition from your cab if you are forced to stand right on top of it, but to not direct the upper range of your tone directly up to the ceiling!