Both of my 350z's had gear grinding, constant sensor, and alignment issues.
Never had issues with the s2k's and I would put them thru HELL, constant track days, one was even turbo'd and never gave me issues save for clutch wear.
Note that I purchased all used. All had less than 40k when purchased.
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1997 Supra TT (900ish hp)
2014 BMW 535d
1965 Mustang 302 5 speed!
2010 Prius
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