Bought this to practice piano skills(I have learned playing the piano like 10 years ago and want to pick it up). Also I need to use the keyboard for midi input for composing music. Received the product 2 days ago, the key actions are good(despite still not comparable to mechanic ones but enough for my purposes). I connected the keyboard to the computer to use Pianoteq 8 VST plugin for the Steinway piano sounds, it sounds excellent. I used it to perform a couple of pieces like Chopin Op.9 No.1 and Schubert Op.90 No.2, it sounds good. A very satisfying experience with the keyboard, and i would recommend it to all people with similar purpose.

The Korg D1 is just an amazing piano that really nails the basics for a low price. The RH3 action is a bit heavier in a good way, but incredibly fast, playing 32nd notes with ease. The main piano sound is wonderful and reminds of Native Instruments Noire. Highly recommended.

Great keyboard feel & acoustic piano sounds (what I mainly use it for) NO external speakers so you could connect via 1/4" Line Out or even 3.5mm to a regular home speaker that has an AUX IN or get budget friendly studio monitors and connect via Line out TRS cables. ( ex. PreSonus Eris 3.5 or 4.5 ). Or even just use headphones. I would not recommend using a guitar amp for sound. No bluetooth available on the keyboard. The pedal that comes included w/ the keyboard does NOT support half-pedaling. You would need to purchase the Korg DS-1H pedal separately. Hope this answers some questions.

Home studio

Action on this piano is top notch. On par if not better then the Roland PHA-4 action in my opinion. Sound engine sounds pretty good with more than enough sounds to get you by. Proper midi out is a plus for external devices and DAWs (with appropriate interface adapters). I wouldn't hesitate to purchase again. Cons. Very heavy (abet sturdy), no speakers (abet proper stereo quarter inch out). Had to have a replacement sent as original order had a few dislodged keys from ground shipping. Replacement one was perfect.

From unpacking and seeing it for the first time.. feeling the key action and hearing the superb piano sound.. To experiencing the other incredible-sounding instruments (voices).. discovering the straightforward interface and enjoying many entertaining demos.. I liked the Korg D1 so much from the beginning (and at each step along the way), I felt the need to downplay my enthusiasm initially, just to keep my opinion from coming on too strong! Out of the box and on the stand, the keyboard feels solid and looks great. The key action is excellent (not too hard and not too soft), compared with many keyboards we'd returned. Our old speakers (and even a brand new soundbar) did not do this keyboard justice. On a tight budget, some affordable multimedia speakers did the trick. The D1 feels and sounds better than any of the other keyboards we tried!