It is excellent to work with. Several years ago, i built a Nakashima bench using a sycamore slab. 5’ long x 28” wide. I had nothing but a Woodriver #4 and hand planed the slab flat by hand. It was no worse than Anything else. There was a section of crotch figure that was challenging due to grain direction varying but it was manageable. Quarter sawn sycamore has an awesome finish and is my favorite lighter colored wood.