Product details indicated that the cover should fit a 136cm/88 key keyboard (advertised width 150cm), but it doesn't without some serious stretching and the use of a few strategically placed clothespins to keep it in place. And even then it barely works. I'd say if the keyboard was around ~110-120 cm in width, might work okay. But as of now, the usability is practically zero. Build quality seems "fine" albeit cheap-ish. 18 euros down the drain and onto finding a fitting replacement.