Hi Russell
I am a first time guide dog owner. I've had my guide dog Bailey for 4 years and I am extremely happy with him. He's a great companion, friend and excellent mobility aid. I'm a dog type of person so adjusting to a dog was not so hard for me as it is for other people.
The training may differ where you live but I enjoyed the training process here in the UK. Bailey came to live with me and I did almost give him back. It's a frustrating first couple of days/weeks and in some cases months. The dogs are not perfect, even they have off days but they all seem to try their best even if they have off days. How much effort you are willing to put into your guide dog will show in how much effort the dog puts into working for you. It's a partnership. Yes, feeding them, caring for their health needs, making sure they're exercised, groomed and given a warm place to sleep at night is essential but they also need love and interaction. guide dogs here really encourage play time and bonding time, grooming is a great way to bond with your dog, as is just getting on the floor and playing with them. I understand not all people are dog lovers but utilise them as a mobility aid alone but I think I'm right in saying that a healthy guide dog partnership are usually the best ones.
My mobility has increased dramatically. I'm more willing to go places I've never been before without sighted assistance with Bailey. People are more likely to offer help in a non-patronising way, [not guaranteed] and I walk a lot faster and a lot straighter. Others who are excellent cane users suggest my mobility skills were not good enough because I say a guide had improved my mobility but I disagree. A cane can't give you the accuracy of a dog when they're working great and my confidence has soared while out and about. I don't know about where you are but people here tend to not be one hundred percent sure what a cane is for and seem more intimidated by it. The dog gives the clear, "i'm blind and may need assistance" yell to sighted people.
Overall, they are a lot of responsibility, great mobility aid and a wonderful companion.
Good luck with your guide dog journey and if you have any more questions I'd be happy to answer them. :)