you can probably use it .. the most important part is cell wall destruction so i would suggest bead-beating in AL/ATL buffer spin down and use the supernatant
I have not, I use the plant kits. Why do you ask? If you're asking because you can't afford the plant kit, you might look up an old plant protocol and make the reagents yourself. Otherwise I'd suggest you do a side-by-side comparison of blood/tissue versus plant kits.