Nanatotwo, you have come to the wrong place for convincing you to not get a Hav for any reason. We obviously think it is worth it. But I will try to be honest about my experiences.
I have two boys who are both house trained. They were not 100% reliable until they were a year old. But, they were very reliable after 7 or 8 months and pretty good at 5 months. Diligence is the key. but now with a 2 and 3 year old I don't give potty training a thought. I have bigger Havs--18 and 21 lb.ers, some have told me that the bigger the hav the bigger the bladder and ability to hold it.
Blowing coat is horrible... but if you are not showing you can keep your dog in a puppy cut. And even if you want a longer coat in the long run, you could consider a puppy cut to get you through the blowing coat stage. Now that they are older I can keep them in a longer puppy cut without a problem and I only brush them 2-3 times a week. when it gets too much for me and them, I cut them shorter. Others on here can tell you better the worked involved in keeping a full coat.
Picky eater... well, yes it is true. But I have one who is and one who isn't. If you are good and never, ever give in, they will eat what is in their bowl. I gave in.
but even so...my pickiest has now become a fairly reliable eater.
They are a delightful breed. A big gentle dog personality in a small package. I have been allergic to animals my whole life and it's why I discovered them. I am not allergic to them, and I like their personalities better than poodles (although I am allergic to some poodles) and bishons.
I too knew going in there would be challenges--- but we were ready to take the time and it has paid off in full. Go for it!