I got mine today . I goes well with my pa600. I had the ew400 and sold it but I missed the Yamaha set up with my korg. Don't need the 76keys. This is 61 notes .and I use it with one man band software also. Tons of styles, wav. Recording ,not bad sound . All for under 300 bucks. This is great for an old retired pensioner. Maybe the 670 down the road . I'm good for now.