Perhaps that's a little harsh to say you wouldn't buy it as 192kbit rate, when you actually consider the point of the tracks.
The 1st point is that the tracks are primarily for use during meditation, where you ideally shouldn't be focusing on the content of the track, but just letting it play in the background, so as long as the binaural and other beats are being effective then that's all that really matters.
The 2nd point is that most people would not really be able to differentiate between the current quality of lifeflow tracks and anything of higher quality, especially in conjunction with point 1 where the focus will be on the meditation.
However, each to their own, so I'm sorry to hear that you don't find them to your liking, yet I do hope that you have found benefit from them regardless.
Hugs
Giles