(Tomatis method = listening therapy.)
We were very pleased with the results of the Tomatis-based listening therapy that my kids did in conjunction with OT. See e.g.
http://www.starcenter.us/services-treatment.html (scroll down to listening therapy and combination therapy), and
http://www.integratedlistening.com/ .
My kids were 4 and 6 when they did it. In their case, being in combination with OT for sensory processing disorder, the purpose was to facilitate the changes in the brain that the OT was making (the Star Center believes in a short, intensive program as making faster, better changes in the brain than the typical once-per-week therapy schedule). However, my then-4-y.o. did have significant improvement with his speech during that time, according to his teacher and his speech therapist. My 6 y.o. didn't have speech issues per se at that point in time, but her ability to process phonics improved significantly (she was reading below grade level; now it's a year and a half later but she's reading above grade level). With the OT, she also showed a very significant improvement in her ability to do her vision therapy - long story - but it's hard to know what role the listening therapy played there. It all seems rather hocus-pocus. But the bottom line is we were happy with the results, and for us the big ticket $ was the OT to begin with; the listening therapy just cost a little extra (we paid out of pocket).
Listening therapy is rather controversial - some people benefit and some don't. It's basically listening to music - usually mozart or similar - certain frequencies at a time. At worst, it's harmless. Because it's so controversial I'm surprised EI is willing to pay for it (though perhaps the tide is turning in the controversy and I'm unaware?).
Personally, if EI thinks it might help and they're willing to pay, I'd go for it. I'd want to be sure it's a reputable program (apparently out there on the internet there are "fakes" that are loosely based on Tomatis but don't correctly follow the method or something).
For what reason are they recommending it? Is it to help with speech/auditory issues or is it to be done in combination with OT for sensory stuff? Very interesting. This is the first I've ever heard of EI offering it.