It was ok. Family room has a photo of a higher floor room with windows onto a side street, however we were in a basement with a view of a wall. Which was a disappointment.
Room was spacious for 4 people and it was good to have proper beds for the kids, rather than a sofa bed as many family rooms do. A/c was very effective, contrary to other reviews, so it must depend on which room you get.
Bathroom had a large shower rather than a bath.
Breakfast was ok. A bit chaotic, had to wait a while for a table even though they'd got us to book a time the night before. Basic cereal (bran flakes or corn flakes), toast. Watery orange juice. Choice of cooked English breakfast or pancakes/fruit.
The message we got from Expedia when we booked had out of date charges on it, eg ot said parking was £23 a night, but when we paid it was suddenly £25. Similarly it said breakfast was £10.50 but in fact it's £12.50. That doesn't give a good impression at all.
Probably won't stay again, there are better options in Brighton for us (we booked last minute this time, so we ended up here). But it's fine. Certainly a convenient location.