iPad - won't play most video clips I want to watch and objects to connecting to anything that isn't apple.
SRAM RED Black front mech - too thin/flexy to function correctly. Replaced with a Force.
On One headset - fell to pieces in a time so short I ended up having to replace the forks due to extent of steerer damage.
Entry to the mountain mayhem event - drive hundreds of miles and pay quite a bit for the worst mountain biking I have ever experienced.