Yes they are amazing. There's a sort of ukulele underground in this country - a friend of mine plays and went to a mass ukulele event at the Albert Hall - the whole audience brought their ukes and joined in.
It is incredibly easy to play but also you can get good at it and be a virtuoso. This is some way off for me! But Dad has dementia and it is really good to get him to pick up the harmonica and play, so I bike round with the uke and we hit the old standards together at least once a week. The Daily Ukulele is a great book, something for everyone.