I have the new M9 phone. The speakers suck, sort of. They sound decent at all volume levels, the problem is, they just arent very loud at all. The dolby helps with imaging, but there is so much compression on the sound, I find myself just turning it off most of the time. I almost prefer the speaker on my Galaxy S3, at least it was loud enough to hear. One thing I do like, it is FAST. It is noticeably faster than my GS3. Games work much better on it. It does produce some heat as noted by others, but it doesnt get out of hand like on the GS3, which would get so hot after 5 mins of game play you had to let it cool down or it would turn off. The M9 gets warm, and keeps on chugging thru my game without any issues. I love the fact I can add more memory. thats really the main reason I got it over the GS6. That and I drop my phone alot, and I am concerned about the glass back on the GS6. I have a case for my M9 and I like it. The image quality is fantastic on the phone. Video is remarkably better than my old GS3. Overall I am very please with the new M9. I just wish the speakers were better.