We just upgraded to a king mattress.  We have  a few other bed frames from Wayfair for our kids and have had pretty good luck with decent prices for decent frames.  We decided to get this one because I like the color, the storage is nice and the lights and outlets are added bonuses!  The drawer at the foot of the bed is pretty wide on the king and doesn’t feel overly sturdy, but it’s not very deep so it’s not like I’ll store anything heavy in it anyway.  The frame itself has a ton of pieces to put together but so far, it seems very sturdy.  We’re used to using a box spring in the past but didn’t get one since this frame works fine without one, but it sits just a touch lower than I’d like, but maybe it will just take some more getting used to.  We may opt for a short 4-5 inch box spring if it still feels too low after a while.  Our kids are very jealous that our new bed has lights on it!