I have some and find them quite easy to use. I think mine are just Remington brand. I find the best way to use them is heat them for longer than recommended, spray the strand of hair with hairspray, then roll up, and then give the whole head a coat of spray when you're done.
Leave them til they're cold, take them out and run your fingers through, and you're done. Pretty easy, and i like the result I get.
If your hair is long and thick, i'd say your curls will drop quite a bit, but that will give a glamorous look anyway with the curls all at the bottom of the hair.