It's the first set I bought for Oxygen, a push forward for my work. Well done and simple to use :-)
I've used Oxyset Headers on a few projects. Easy to implement, customise and the animations are slick!
Well coded as I've experienced no issues across on desktop or mobile devices.
I really like all of Marko's products, they are well coded and very useful.
I use the Missing Grid set all the time.