Grigora provides many features and will be a useful website builder for many purposes. It is quite easy to comprehend and find your way around. Comparing this to other website building competitors in that area, I would rank the user friendliness higher than what I experienced anywhere else. Support is very helpful and reacts fast. Improvements and upgrades were implemented while using Grigora.
The platform is around for some years now, which is a positive sign for sustainability.
Despite all these promising characteristics, not every function is top-notch yet. Tried to implement for a knowledge base and are not completely convinced yet. Better and more appealing than a dedicated knowledge base builder on AppSumo I tried before. Grigora provides more design and layout options.
Hard to say what would be a fair evaluation. 5* if it is exactly what you need. Test before buying. 4* if you have certain requirements that are not met (yet) like in my case.
I leave it at 5* because maybe it was just my specific requirements being too demanding.