It appears to be as simple as adding nuts/water/sweetener to a blender, blending for 2 minutes and that's it. Seems a lot cheaper than buying almond/rice milk from the supermarket too.

Any experiences?

No, but lots of recipes online - cashew, almond, sunflower etc

Yeah, in my raw vegan days I used to make them every day. Almond, cashew and hemp milks were my favourites. The process is quite straight-forward from memory.

Soak your nuts or seeds overnight, or for at least an hour, add to blender with still water. If you are using hulled nuts you will need to strain the milk with a a strainer, or nut bag afterwards, You don't need to do this with cashews.

Then return to the rinsed blender, add vanilla extract and sweetener, and cocoa powder if you want to. Then pop in the fridge.

You could use banana to sweeten, and thicken, or something like agave necter. My preference was to use dates, soaked and deseeded. Medjool dates were the best.

You could try a lazy almond milk by blending almond butter, water and sweetner. Not as good as using nuts, but less hassle.

Anyway, it is quite easy, but I'm sure you can find recipes online if you're still unclear,

Thanks!

How tasty is the milk or is it just mediocre?

Yum. I used to love it, and still find shop bought watery and disappointing in comparison. But it's a personal thing obviously, you may find it a big hassle for nothing.

Anyway, start with something easy like cashews, they don't need straining (apparently you can use a french press to strain, I've never tried that), although you could for a smoother texure, and experiment.

I need to invest in a blender first!