Had mine for nearly a month now. Dropped a Samsung 850 250gb in it a week into using it. I only use it on battery to make beats until I'm at 10%- 20% then plug it in to power. Trying to conserve the cycles of the battery. Anyway, I use it with a DSI Pro 2 and a DSI Prophet 12.
The first week or so I only noticed it got a little laptop hot on the bottom. Identical to my MacPro. I'm not jumping to conclusions. But I feel it's the hard drive. After about 2 weeks with the Samsung in the unit. The left side of the screen over till the pads started, was a little warm. To warm for my liking to always be in the unit... Now it wash't the bottom of unit laptop battery hot. It was just warm. Where the right side was the usual I was accustom to in the beginning. I've taken the Samsung out. Went out and bought a 128gb sd card, stuffed it in the back. Used it now the last 3 days, about 4 hours constant run on battery before plugging it in, the unit is cool like the breeze.
My advice is to grab an SD card and stick it in the back, stay on the cool side. $50 - 128gb is plenty of storage for me anyway.