Very interestingly heavy. Straight concrete. From the place still try to move. I bought for 15k, then the price dropped to 10k, watch the price. Has some pros: The sound of the keys pleased, as well as the ability to switch music or adjust the sound (for me it is extremely convenient). With its cons: With a sharp transition from membrane to mechanics, itโs terribly unusual. There are no programs for Linux I noticed like in one game the music does not switch. Maybe it has something to do with the game itself.