My DD was also born with a cleft lip & palate so she got tubes even though she only has about 1 ear infection per year (which is unusual for cleft palate kids).
As others have said, we have no regrets. I would reccomend seeing an ENT and having them do it- which I think you are. Duke is awesome!

We had wonderful experiences there. Her tubes were put in with another surgery so the tube part was no big deal.
As others have also said, you may still get infections... they will just drain. I personally think it is wonderful to know what is going on as opposed to guessing or like us, wait until she flunked hearing tests.

Anyway, because of our history with the docs and her status they would give me prescriptions over the phone whenever I saw drainage. I could get the infections cleared up right away, didn't have to sit in a room of sick kids, etc. etc. Anyway she got the tubes as 10 months and actually had more infections since then (she is 3.5 yrs now) but they are easy to spot and clear up.
I , personally, as a mom and a molecular biologist, want to save the antibiotics for when their is need vs all the time (as another ped reccomended to us). I would be carefull with any child but especially a girl on those constant low dose antibiotics.... who needs a yeast infection when they are 15 months old????
As others have also said, tubes can be in too long so just keep seeing your ENT as reccommended. After worrying every winter that her tubes will fall out and we will have to get (and pay for) another set, she still has the original set from 2002. We are due to get them taken out this spring if they don't fall out before then.