The Forum Musket is a step above their entry level boot that gets you over the renting problem but it’s still a little below the quality and tech that avid riders would expect or tolerate. So if you want the Musket it’s going to be good for a beginner who knows they are committed to snowboarding.
The Musket does have a pretty new rather cool tech that they call Tweaker which allows for a different flex in different directions. The inner ankle has different articulation to make this happen which makes for a pretty good freestyle boot and super fun for buttering and general fooling around. The reduced footprint that makes the boot smaller on the outstide is great for this price and is almost the same shrinkage tech that Burton has which can help you ride a smaller width board to get better response for your boot size. This is great for you size 11ers out there. So if you want some good freestyle tech for the price the Musket might be a good call. If you mainly ride the mountain and only like heel to edge transitioning you might or might not like these boots.