Metroid: Other M... How long did it take you?

How long did it take you to beat Metroid: Other M? Debating whether i have enough time to play it before work. thanks!

Tooke me about 12 hours to 100% it, but then you get hard mode which sounds really fun to me, as you never get missile expansions or energy tanks.

Around 7 hours but I didn't get 100%