Yes! I find that Milkman dissolves really well, better than other brands such as nido. I also tend to prefer the flavour of milkman as it seems the most 'natural' to me, compared to real milk.
FYI, it now has its own website www.milkmanmilk.com
where you can buy cases of it as opposed to single pouches at REI. Its a nice option if you don't live near REI like me.
It's great to see this classic brand making a comeback.