Based on my experience, it's too slow for doubles. If you have strong arms, I think you'll be fine but I still dont recommend it.
There's no hard and fast rule when it comes to racquet selection. It depends on your playing style. If you are a baseline player and keep hitting smashes from the rear, then a N90 might be suitable for you. If you are a front player, the N90 will be too unwieldy.
In badminton, there's no such thing as 100% baseline player. You still need to move to the center and front. N90 is strictly a singles racket. Everything forehand is excellent but everything backhand is a nightmare especially in doubles. I had 2 and sold all.
FHF's racket is still very heavy in my opinion, for doubles. it is very possible that i am weak, but of the three Li Ning, N90, N50, and N80, the N80 is the lightest of the three heavy rackets. i respectfully disagree that the N90 will give you a nightmare hitting backhand for doubles. i believe that because of the swing weight, the N90 will slow down your "quickness" which is needed in doubles, for both forehand and backhand. when i play singles, the N90 is pretty balance, just a tad bit heavier than i needed. for doubles, my reaction slows down dramatically whether it be a forehand shot or a backhand shot. i terms of communciation from the racket, the Li Ning rackets i have listed communicates very well.
