I picked up one of these in an Orlando store and it has Infineon chips. Looks like good build quality. As most everyone knows, RAM has jumped in price in the last week so even w/o rebate it is competitive for current prices....with rebate, this is a very good deal.
Re quality, I've only had one problem ever with PNY, a bad 32MB SDRAM DIMM after I had been using it for a couple of years...by the time it went bad, wasn't worth the hassle of getting replaced. As I think about it, I purchased that RAM during the famous "BB PNY 32MB DIMM for free after rebate" fiasco. I puchased six and got all of my rebates although it took a call. Recall getting their CFO on the phone, nice guy who was very apologetic about the delays in paying the rebates. Said they were simply overwhelmed with the response and had been flooded with rebate requests. Either BB or PNY took a bath in that one.