I quite like them although they have taken away the old white application tube with the wire inside which makes fitting them without the unsightly brackets at the rear wheel even harder. Funny enough when I rang them to ask why they'd removed it they told because it was too hard to fit!
The thing with Scottoilers is they take a bit of skill to fit and set up so that they work correctly, most don't have the skill or the time, that's their Achilles heel and they get bad press for either dumping oil, not oiling or over oiling. The most common fault I've had to rectify on dealer fitted units is the black application tube being the wrong way around! They also don't work too well near the horizontal, loose or over filled (as mentioned), most I've worked on are set to deliver too much oil and have been poorly fitted by owners/dealers basically just slapped on the quickest way possible. I've also had the odd one that just wouldn't prime properly or was all or nothing, in all cases this was down to factory assembly issues or worn parts all rectified by Scott.
I've fitted many over the years, got them on my ZX10R and the XJR they work perfectly and are invisible unless you lay on the ground.