I sort of have one, she is an eighth bearded collie in with the mixture. She's 6 months old today and we've had her for 2 months.
There are a variety of different coats ( along the lines of fleece, wool and something) and it is fairly likely they will shed and will cause allergy - my friend reacted faster to our puppy than she does to the 3 cats. There's all the stuff about which generation they are as well eg. F1, F1A, F2 & F3. You can't really tell as puppies whether they will shed or not and a lot are ending up in rescue at the moment as people are turning out to be allergic (and you often can't tell with the puppy coat) and they end up bigger and bouncier than people realise and the Labradoodle Trust are urgently requiring foster homes as they've had so many in.
As Rene said, they can get quite bit but there are minatures, mediums and standards - however there are a fair few minatures who have ended up bigger than expected, so probably best avoided if size is an issue.
They are very bouncy and mine suffers from being over friendly, they definitely need a firm hand or can potentially be a bit of a nightmare if you have a highly enthusiastic & large bouncy dog. They are also pretty intelligent having poodle in them and need occupying. I've just gone downstairs to see what was going on as am working upstairs as is DH and there was a huge amount of barking. She'd finished her tug a jug and found a slightly open gap in the chest of drawers and has been pulling hats all over the place. She's now armed with stuffed kong, refilled tug a jug and stuffed bone in freezer for later. Unfortunately she has kennel cough so not getting walked enough which is a complete nightmare. Training and lots of it is an absolute must which is currently an issue as she's not been able to go due to her kennel cough. We're having a few problems with how she views DS (6) and he's now a bit wary of her. Inevitably it is his pants and socks she legs it with, I often hear him yelling " Mum, dog's run away with my pants again".
She is my first dog and everyone keeps saying what a fab dog she will be when she calms down and I can see this in her but the last 2 months have been harder work than having a child. Google for the Doodle Times forum and go and have a look there.
The plus side is that though she is a pickle, she is completely lovely, incredibly friendly and makes us laugh a lot. DD summed it up this morning when she said there was a DDog sized hole in the house which is now filled and the family feels right. When she's not ill she is reasonably calmish with her one walk a day (5 mins per month of age) and several short training sessions a day to mentally wear her out. I think mine is now currently eating the stair gate.