No crosswind limit
I just flew one today for the first time. There are no additional crosswind limitations. I have not seen it in strong wind conditions yet.
The winglets are approximately 11 feet tall. They add about another 10 feet to wingspan, so additional taxi considerations apply. There is a IAS limitation and an issue with using the SB. In fact, there is a new mark showing the 50% position for the SBs (it will auto-retract to that position in certain scenarios).
It burns less fuel, and it was noticeable to us by both FF and the block-in fuel. One drawback is that they like to flight plan these jets at a slower speed.