I tried it two times, some 1,5 years between the tries and the second time I couldn't notice much difference.

During the same time Pianoteq evolved a lot, after v4 with the Bluethner came the new v4.5 engine with the Upright at they brought real refinements. If this pace will be retained,  very soon we shall have the situation that nothing surpasses PTQ.

Maybe this Chinese product (and I say it with sympathy for his developer) will also evolve to this high level with potential as PTQ at some time in future, but it is still a newcomer.

At next version, I expect beautiful tone color that surpass sampling sound source.

"From eternal fan of your company!!"

I supose Modartt could try a hybrid approuch, like allow just some fraction of the sound to be sampled, like the fraction that carries warmness, sort as they did with hammer noises.

But this could make things too easy and defocus the atention from the perfectionist challenge of get full naturality by just modeling.
They need some challenge intusiasm to keep searching and perfecting modelling.

However, It is another feeling when compare with pianoteq.
Sound of this VSTI is actual, warm, and natural.
Want that pianoteq develops much more in this side. 

Is it better than PT? Or worse?

Anyway, I am on the brink of jumping ship towards sampled pianos. There is just some dullness in the PT sound compared to samples. I know this has been discussed (fought) over a dozen times already, I don't really wanna start a new discussion. Just sayin.