I havn't purchased any 'laser' product from Sony since the mid 90's as they are far too unreliable.
Almost all CD players use Sony laser assemblies - including the stupidly high priced examples. As a company we've always purchased replacement lasers direct from Sony, they cost a little more but are 'supposedly' the 'better' ones off the production lines. An old friend of mine, who ran a disco with another mate, sent his Denon twin CD player back to Denon for repair - they charged him over £100 each for two new Sony KSS210's plus fitting
As such their reliability is as high as every one else's CD players
(with the exception of Philips of course, who's lasers are different and less reliable).
There have been a few other minor players in the laser market over the decades, but none have ever had much impact.