I haven't heard of those brands you mentioned. We use the Swaddle Me blankets, too. (at Babies R Us and now I recently saw them at Walmart!) The SwaddleMe blankets are a huge success in our home! I love the organic cotton blend one - very soft and it stretches a bit so I can wrap her very tightly with that one. She used to fight me on when I would first swaddle her, but once I got her tightly swaddled, she was happy and stopped crying. Now, she recognizes that swaddling means night-night time. So she stays put and is content when I'm swaddling her.
My daughter will be 4 months in one week, and she still needs to be swaddled to STAY asleep all night long. It really helps her to sleep longer. She can go to sleep without it, but she won't be asleep as long as she would if she were swaddled.
She's using the large size now - she is big for her age though. But we used the small size for a while.
I recommend buying at least 3 so you can rotate them -- and always have one clean in case baby has a blow out in her diaper or spits up a lot all over it.