I am an amateur pianist (grade 5-6 ish) and love the U1 piano I have. Probably the best keybed I have ever played, it just seems natural and right. The only thing that has ever come close was a Kawai CA67 I owned for a few years. Almost an exact replica of the U1 keybed.
The Genos is probably one of the better keyboard keybeds I've played, at least as far as I can remember anyway. As many have stated the cheaper PSR ones will probably be quite a bit less in quality. I have read comments (mostly on YouTube) that the SX900 / SX700 keybeds can get noisy over time. No idea if that is true but just thought I would mention it.
I can sort of get used to the Genos for piano parts but it's still weird having the missing keys and I tend to make more mistakes on it than on the piano I reckon, due to the lack of proper weighted action. I will be pairing the Genos up with a weighted action soon. Looking at a Kawai based action or the Yamaha CP88 as was recommended to me here on the forum just the other day.
Maybe it is an option you can consider. Something like a second hand Kawai ES8 or ES920 would probably be excellent alongside an SX600/700/900 / Genos. Buy both a Genos and Kawai ES or yammie P515 second hand, a stand and speakers and you're still most likely saving money than when buying a new Genos on its own.
After quite negative experiences with my Korg PA5X-88 and also a Roland RD 2000 I am weary of the everything in one solution + will be avoiding Fatar keybeds and probably anything non Kawai or non Yamaha based for the rest of my life after feeling financially burned with those boards.
Yes, it helps and so did the two previous comments. Thanks all. I think I heard the CFX first in a P-515. To be honest, it doesn't 'speak' to me. But the Bosendorfer certainly did so that will be a must have in my next keyboard. I do not read music, I strictly go by ear. I think I can get used to the light keys. The search goes on. I must admit that Alois Müller's daily offerings, now on the Korg Pa5x, is making quite an impression (I can speak German).
Strideplayer
I really don't recommend the PA5X88 for many, many reasons. Have a look at my previous posts and I can tell you more if you need that info.
I remember my Yamaha S80, which I owned for 20 years being a bit noisy but still better than the Korg PA5X after just 6 months which is developing faults in many keys. Just awful for a price that could get you an excellent second hand U1 that will last you for the rest of your life!
There probably is quite a bit of value in the experience Kawai and Yamaha have making real pianos that they carry over into their piano mimicking products. I am not so sure other companies know what they are doing when it comes to weighted actions! Roland usually gets rave reviews. I don't see it or should I say "feel it" personally.