I think it's 5 years old. It was a 5 inches tall when I got it, only 2 inches above th graft. Now the main trunk is better than an inch in diameter.
Yes, the flowers are tiny and actually more purple than pink. It bloomed heavily, close to 100 blooms at one time early this summer. I think next year I will try to pollinate it with Meyer lemon pollen, just in case my problem is lack of pollinators.