There has always been complaints of quality issues with Saitek stuff but I can only go on my own experience. The first Joystick I had on a PC was a Saitek(it had fold down feet but I can't remember what it was called) that was given away good as new when I got an X45. I decided I wanted the X52Pro when it was launched and gave the X45 away, it is still going strong I am told. My early production X52Pro is working perfectly and it has had a lot of clatter one way or another. On that basis I can't complain.
I bought some CH Pedals and by comparison they gave up the ghost after about 18 months, customer support was non existent and I replaced them with Saitek pedals which again are going strong after years of use, the foot plates are further apart as well so they are more comfortable too.
The X55 hasn't tempted me for two specific reasons, the first is that I would miss the 4 way hat switch under my left finger on the throttle, I have that set up to lateral thrusters and particularly in combat that is very handy, the other is not being able to lock out the twist rudder. If the 52 Pro died on me I would buy the 55 but until then I think the 52 suits ED better.