Baby in Upper Class?

I am wondering what the general consensus is on here about travelling in Upper with a toddler? We're going to book soon to fly MAN/LGW-MCO in May/June next year and I note that there are still quite a few Upper seats going for the sale fare, which is somewhat tempting as Y+ seems to be quite expensive on the dates we're looking at.
Our little boy will be 18 months when we travel and is usually very well-behaved.
Obviously we're entitled to book what we want, but at the same time I don't want to spend the whole flight getting "evils" from the other passengers! I figured MCO was less likely to be a problem with a toddler in Upper Class vs a more business-orientated route like JFK etc.
Any recommendations seat-wise if we do end up taking the plunge?
Our little boy will be 18 months when we travel and is usually very well-behaved.
Obviously we're entitled to book what we want, but at the same time I don't want to spend the whole flight getting "evils" from the other passengers! I figured MCO was less likely to be a problem with a toddler in Upper Class vs a more business-orientated route like JFK etc.
Any recommendations seat-wise if we do end up taking the plunge?
