I have a golden (14 months). He is the LOVE of my life. As someone 14 months into the process I thought the below might help you:
Benefits
Super intelligent - he was house trained by 10 weeks old. Learnt down/heel/sit/stay/wait/recall by 12 weeks.
Loving - honestly just the sweetest and kindest dog I have ever had
Loyal - completely unwaveringly loyal to me. But also a bit of a velcro dog (he likes to watch me wee)
Confident - despite being attacked multiple times, he still wants to say hi when I let him (other dogs I have had - GSDs, Cockers, other retriever breeds, have all been terrified after being attacked a few times)
Good hugger.
Needs loads of exercise (a big plus for me!)
Downsides
People LOVE him - you'll need to train yours not to mob people, even if people DO want to say hi. Because (TRUST ME) the last thing you want is a 35-40KG Golden tugging you over to anyone who even looks at them because as a puppy everyone wanted to fuss them and now they're big...they're too big and no one wants to say hi. So I would really encourage you to let him interact with people, but always be sure you don't let him jump up because it's a nightmare to train out of them.
The fur - God the fur. Everywhere. Tumblefurs as far as the eye can see...In my food. In my bed. In my shower. And I groom him every day.
The cost - He costs me about £400 a month.
But, I wouldn't change him for the world.
I've had GSDs/Cockers/Flat Coats/Mongrels/Collies - Goldens are by far the best.
That being said, they are very mouthy and mine was a total wanker for about 6 weeks between 14 weeks - 20 weeks when he was teething. He LOVED land sharking at me. He's grown out of it now. But I spent several nights crying about wanting to send him back (and I am a massive dog person!)
I would recommend you do a monthly lump inspection though (they're prone to cancer) and get your bitch used to having her ears checked etc (they can get very dirty ears).