As CTO I deployed Hybris to consolidate several websites, 11 in fact. Hybris is decent but you need to review really how big your site is going to be and a few pointers

1. Whatever you expect for the setup, allow double.
2. Hybris resource is very expensive for contractors and there is a lot of really bad ones out there, still charging say £600 per day.
3. Solr is vanilla and agree you are best using something else but in reality you will prob just plugin an overall recommendation tool also.
4. Like above, the reality is there are better modules around then just using the hybris ones so be sure of what you are buying, i.e. do you need a framework that is fast where you can then plugin a diff search tool, recommendations etc OR are you going to use all of the hybris features. The former would be cheaper and work better for conversion.
5. Reporting is terrible. Use avora (www. avora.io) to produce analytics packs on top of hybris. (disclaimer, I work at avora)

In summary, it scales but the underlying modules/features are not in my opinion any better than what you can get elsewhere. If you need scale it’s a good option. If you turn over less than £100m then a hacked magento will do the same job for less. I’ve deployed most ecommerce providers so I think the opinion is worth something but of course everyone can have mixed experiences.

Just my opinion.