Sorry for ignorance, but is this discussion for any special type of call recording ?
I am using Auto Call recorder on my Sprint S2-epic touch with complete satisfaction.. following is the link. https://play.google.com/store/apps/details?id=com.appstar.callrecorder#?t=W251bGwsMSwxLDIxMiwiY29tLmFwcHN0YXIuY2FsbHJlY29yZGVyIl0.
I have been using it since a month & it is perfect, as it records both parties voice, quiet clearly. I have observed that my voice is little louder in recording, whereas calling parties voice is little low. However, it is clear & we can make out all conversation.
Also, it records automatically, so once it starts in background, it starts recording whenever call active on phone. It records call on SD card & format is .amr, .wav & 3gp. There are many settings to play around, but didn't explore much. Also has a Pro edition, but free does the job very well.
If you want apk, let me know, but it is free on play. It has got 14k+ 5 star ratings, so one can go with the audience..