I have tried most of the recording note takers and found the all lacking in one way or another. This one actually performs most all requirements and the sound quality is very good. The app nickel and dimes you to death until you give in and buy all of the options. I would have rather just paid ten bucks to get a fully functional app. I have no need for the transcription service so I cant report on its quality.
As of this date there is no better app for recording meetings, discussions, lectures... The low level boost option works very very well. Worth the price.
Notsewnek about Smart Recorder and transcriber, v3.1.6