You expect a lot from a 4 star hotel at this range of prices. We went 6 people on a business trip each having his/her own room. The breakfast is good, rooms are big enough but they lack air conditioning, fridges, some windows do not seal completely and there are rooms that have issues with water pressure at the shower. My room had a common double-door with some neighbors and it could be open from the other side. Fortunately, the staff was open to move me to another room after complaining about this.
The wi-fi is slow and disconnects often.
The windows at the ground floor are very close to the ground and anyone can enter easily.Take care not to leave them open when you are away.
We requested invoices when at check-out and we received only one. I had to call two times to finally receive the rest of them.

Spent 4 nights at this hotel during Nürnberg trade show week, i.e. paying room rates up to €225/night as opposed to the normal €69/night.
Was given a top floor room with a broken shower (producing only a slight trickle of water) that they were neither able to fix for the entirety of my stay, nor could they offer another room due to hotel being full.
This particular week, temperatures in Nürnberg varied between 28 and 30C. Rooms in this hotel have no air conditioning or at least mine didn't. While the lack of air conditioning did meet with expectations, a working shower would have been nice.
On top of that, WiFi was down in the entire hotel for 2 of the 4 days.
The room safe was faulty, both in my room and in the room of my colleague.
The hotel bar was closed by the time we got in arriving (well before midnight) and the mini bar in the room was permanently locked for the entirety of the stay. This problem was of no concern to hotel staff.
Charging hotel bar products to the room worked sometimes, and sometimes not due to problems with "the system".
In fairness, unlike other reviewers, I cannot fault room cleanliness. The room was impeccably cleaned.

Upon checkout, I asked were they really going to charge the full rate given the circumstances. They said they'd see what they could do but "the system" was down so they would have to email me the bill later.
2 days later, the bill arrived in the post with no contact name and with the originally quoted room fees. One single breakfast fee had been waived.

I do not enjoy leaving bad reviews. Customer satisfaction could have been easily achieved and this bad review easily avoided by charging appropriately for the product they sold but this hotel consciously chose not to do so. Demand or no demand, I expect Fawlty Towers prices for Fawlty Towers standard. Not 200€+ per night.

I cannot with the best will in the world empathize with the inexplicable lack of customer care I experienced at this hotel.

I will do my best to avoid this hotel going forward.

I haven’t written a negative review before. If I was you I wouldn’t stay at this hotel.

Here is the story why: On arrival I needed to extend my stay by 1 night. I was quoted a price of €260 for the extra night, €200 higher than the online price of my original reservation due, the clerk said, to a large convention in Nurnberg that was starting soon. I thought it seemed strange but agreed to pay it on good faith and without checking online because I was exhausted after flying from California to Nurnberg and got lazy, essentially. Definitely my fault.

A search I made on the day I was to check out I found my room online for €69, just €9 more than the original online rate. Which means I had been over charged €191 for my last night’s stay. I showed the clerks at the front desk the search screen on my phone and they kindly agreed to look into it and get back to me. They seemed confident they could get a refund.

Spoiler alert. Nothing has been refunded so far. In subsequent phone calls the hotel has refused because of a lack of proof of the rate, despite the fact that two women at the front desk saw the price and told their manager that. Conversations since have ranged from rude to condescending to weirdly aggressive.

This is not only a mediocre quality but actively dishonest hotel group.

Thanks,
Alex