My DD13 and I did both last year. She (and I) love Lilo & Stitch so we were looking forward to Ohana. We arrived shortly before our ADR time and there was a line. No biggie, I expect that. There was a family in front of us that asked if there was a table available and they were told no and that they should have made a reservation, that would be the only way to eat there. We walked up and were handed a pager that went off less than 2 minutes later. We walked in and the restaurant was over half EMPTY! I couldn't believe they turned away that family, and made us actually take a pager and sit down before seating us. The food was very good, the service was ok, but the character interaction there was not great. Mickey came to our table before we were even sitting. I thought he was just swinging by to say hi, so I waved and sat down and he just stood there. I was like "Oh, wait, let me get my camera out". He stood with my DD and took a picture and was gone, same with everyone but Stitch. We both DisneyBounded (I was Lilo, she was Stitch) and Stitch was the only character who noticed and pointed it out. Stitch was great, but Stitch was also great at MK that trip, so we'll probably not go back.
1900PF was awesome, everything about it. We arrived about 15 minutes before our ADR and were seated right away - no pager. Our server was great, and the character interaction there was the best! Tigger and Pooh were their usual fun selves. Mary Poppins was practically perfect

Alice was super cute and loved our hair bows (Mickey and Minnie) and told us how she wanted her own hair bows just like ours! The Mad Hatter was amazing!! I loved watching him interact with other guests before arriving at our table, but he really went all out with us. Both my DD and I were eating strawberry soup when he arrived and he looked down and said "Ewwww! What in the world is that?!" My DD said it was strawberry soup and that it was delicious. He said "Oh, yes, it is delicious, but you're eating it wrong!" He then ran around the restaurant and went in the back. I thought he left, but he came running out yelling "HERE!!! THESE WILL MAKE IT BETTER!!!" He had straws. He made my DD and I have a strawberry soup drinking contest! Oh we couldn't drink any we were laughing so hard, but it was so much fun!
I will tell you, when we were there the Mad Hatter was very good about reading people and responding to them. There was a young girl at the table next to us who was a little terrified of him, but he was quiet and gentle with her and made fun of her ugly (ET) doll. She was laughing by the time he left their table.
If you've never done 1900PF, I suggest giving it a try, I don't think you'll regret it!