Pros: Purchase this MS Duo 128Mb for my new SE S710a, works seamlessly...the S710a read it no problems at all, the phone memory show the MS Duo have about 123Mb, thanks Newegg.com make my shopping easy, can't beat the price, local Bxxt Bxx store wants $xx bucks. Highly recommended.
Cons: Slight high shipping charge, FedEx just dropped them by my front door, no one signed for it.
Summary: I originally ordered the 512 MS Duo Pro. Then I found out that my device did not support the Duo Pro. I RMA'ed the memory stick (restocking fee waived) and bought this one, and I have not had any problems with it whatsoever.