Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nice Product, Poor Quality Control

I, too, upgraded from the VT-90 to the VT-300 for the extra time capacity. I also prefer not having to shop for foolish watch battery sizes. Standard AAA's are MUCH easier to find and last a lot longer. A volume control would be nice, since playback is loud, and that sucks battery life fast! Talking quieter into the unit improves the loudness, but fidelity fades along with it.BUT -- my biggest gripe is the cheap buttons. They gradually deteriorated over time, either failing to connect or bouncing (start-and-stop recording immediately), missing the recording repeatedly. Now, I can't even get it to operate 1 time out of 30 button presses.The BEST feature is how compact it is. Nobody else has one that even comes close in size. Too bad they didn't design a better keypad.