I've tried many binaural beats CDs, including esoteric expensive ones I borrowed from a friend into them. Most of them suck because although they probably (?) have the right difference in frequency between left and right ear, the two frequencies were fairly high up in frequency, and I find it dissonant and irritating pretty quick. My guess is that most CDs do this because they can't assume that you have good headphones that can really do deep bass. If you have both L and R sides at low frequencies, it is **powerful** and it is less irritating, or at least it is for me. Also a bunch on the market have crappy new agey chimes or amateurish music that is lame the first time you hear it, and way more so the 20th time you've heard it.
In contrast, there are TWO CDS THAT ARE AWESOME, which I continue to use, with my big headphones that can do the low bass...
I listen to these two CD repeatedly and enjoy the meditative and sorta head-trippy effect. I find they tend to calm me and focus me. It feels like it is increasing cooperation between my brain hemispheres. Like, when I'm doing very left brain stuff like programming, I feel more creative. And sometimes I feel more grounded, and more social (less shy and less self-involved) afterward so it's easier to do other things in life.
I'll listen to both of these in quite varied settings. Not just meditation, but also cleaning the house, or programming code, or blocking out sounds at work, or running on a treadmill.
As I mentioned, these two CDs require headphones with GOOD BASS RESPONSE. For the record, I'm extremely fond of my Ultrasone 650 headphones, which btw do not need a headphone amp to have deep bass with iPod / iPhone, btw. Ultrasone is a brand not well known outside recording studio / pro audio worlds. Here's a link to more of their headphones.
I strongly recommend these two CDs to geeks and non-geeks alike, and to those who like traditional drugs and for those who are 'straight edge'! :-)
I hope you enjoy them!
I'm not affiliated with the guy who made them, I just like his work.