I used to work a lot with UVLayout and I still love it for it elegant workflow design (everything keyboard mapped = such a fast workflow). UVlayout mainly saves time for relaxing shells because it can do some fancy stuff in that regards. I do however the real layout always in max manually. But these days I kind of lost…
I used to use uvlayout at old job and loved it. I use only max unwrap now and scripts like renderhjs's textools. I dont have to go through hassle of exporting and opening new application.