We had a Groodle in the past (Golden Retriever x Poodle). We suspect she was mixed with a mini poodle though, as she only got to 11kg at her highest weight.
She was sweet, very much a people dog and not a dog's dog. She didn't like other dogs at all. She was very flighty and scared of her own shadow. She barked incessantly. She was a picky eater. She was fairly obedient and could be off-leash with no problem (great recall). She learned basic commands easily, and came to us virtually house trained at 8 weeks old. She had A LOT of energy and needed walking twice daily. She also had serious grooming requirements: very fine, "wavy" (not tight curly) hair, that got matted like no one's business, and would grow out around her bum and then cause her poop to get stuck in it etc. I was permanently put off ever having another dog that needed grooming after her.
She was very sweet, very docile and a lovely dog. But the barking was extremely irritating and difficult to get under control, and the grooming requirements were next level. We now have a beagle and a puggle, who are fantastic but also present their own pros and cons.
The issue with a mixed breed is that you never know which breed is going to be dominant in their personality. Ours was almost completely poodle, with the only obvious retriever trait being her love of water and wanting to lie on the cold floor as opposed to in a bed.
Our puggle is aaaaalll beagle. He even looks like a beagle, just a black and white one! Not a pug trait in him.