I know this is old, but I wanted to show an update for my experience with the ScottOiler.
I bought the VSystem about a year ago. 12,000+ miles later, and I am very happy with it. I installed it at the same time I put on a new DID VX2 chain and Superlight front and rear sprockets. This is what the chain looks like after not touching it for about the last 1,000 miles:
I love this thing! Is there fling? Of course, but my chain is ALWAYS clean and ALWAYS lubed. After 12k miles there is not apparent wear, no noticeable stretching (the only time I've adjusted the chain was when I changed the rear tire 6k miles ago).
The cost of the system (~$130) will offset the replacement cost of the chain and sprockets after 1 time.
I have the normal reservoir and get about 700-800 miles from each refill. I used the included Scottoil until it ran out, but then switched to 80wt gear oil. It's considerably cheaper at about $9 a quart vs $20 for 500ml of the Scottoil.