Merlin Magic Sleep Suit

Kristin
the size says 12lbs...has anyone tried this with a smaller baby?  My LO is 11 weeks and around 11lbs but HATES a swaddle and always wakes himself up bc of his bad startle reflux he still has.  He's exhausted and can only sleep in the rock n play and when he's being held.  want to try this magic suit everyone talks about!