2010-ish the tooling for the press fit bb shells wore out and caused the shells to be bored out a little undersized. Once the bb unit was pressed in.. some split. They found the problem.. its now sorted.
It didnt stop me from buying one.Most manufacturers have problems.If you go narrowing down bikes in the mtb world in that fashion.. good luck,its going to be a long time before you find the safest purchase.
I actually had a wee spin on a 5 earlier and climbed up the road near to where i work. Looking down it was noticeable under load in a silly gear the amount of movement compared to the 514.I was watching the rear fixing bolt for the shock move left to right.Small amounts,yes.. but moving unlike the 514 none the less.
I would still like to maybe try a 5 one day.It feels such a rapid bike and dont get me wrong i may sound like i`m making it out to be flexing around like its a piece of plastic compared to the more three dimentional/triangulated rear ends of frames such as old and new turner 5 spots,giant anthems,trek fuels etc etc but its not that bad.For the girth of it and weight.. its amazing how stiff it is. But after riding other bikes.. nowhere near as stiff.
Just what i`d expect for something thats fixed something like 20 inches away from the rear wheels axle by the main (and only) pivot.
Like other single pivots such as superlights and hecklers.. all that leverage over such a great length will never be stiffened up like the stiffness we will get from the likes of the frames mentioned above.
you can choose your own paint colour too ! 
you can choose your own paint colour too ! 