To the OP. I am a big fan of the current production Sphinx pistols. I own a Compact and a Subcompact. If I could get my hands on one I would also own a doutone which is all stainless steel.
That said my Subcompact did have to go back to Sphinx. You can see more detail of that RMA in this thread. They replaced the barrel, slide stop, pivot and guide rod. They also replaced the rear sight which had a tool mark on it.
http://thefiringline.com/forums/showthread.php?t=563792
Since its return to me the gun has been 100% and is slick. It is slicker than my compact and I carry it most days. The trigger is fantastic. It is lighter than my compact which has Cajun Gun Works springs in it. The DA pull is coming in at 8lbs 6oz avg of 5 pulls and the SA is 4lbs 6ozs again avg of 5 pulls. I really like the way they feel in the hand and the level of finishing that goes into the pistol.
There are however some draw backs to these pistols. They are a small manufacturer and have the support of a small importer. They are not Sig Sauer or FN Herstal. They are Sphinx and Kriss. The economy of scale is not there yet to have large aftermarket support because there simply is not enough demand. They have been slow to get night sights approved and into production. This is not a big deal for me but for many it seems like a deal breaker.
The other main issue that has come up is that the way the guns are manufactured they are super tight. Maybe too tight and as a result Cajun Guns works stopped working on them. They were too labor intensive and were hard on their machinery. There is a thread about it over on one of the CZ forums in the clone section. I cannot verify the truth of these statements but David has always been 100% upfront and accurate every time I have dealt with him so I have no reason to doubt him.
As others have stated I believe that production is moving into the US for many of the current models. Time will tell if the quality is the same and I would imagine the support will be better.
I think that they are great guns and worth the price of admission if you do not over pay for them. Do not pay too much and by too much I mean more than $850 for a Compact, $800 for a Subcompact.
PS there are mags available right now on Kriss' website. They just got a shipment in.
http://kriss-usa.com/shop/products/sphinx/magazines