Right now I'm using Geek's Toy over Bet Angel simply because of the option to have the in-play interface in a vertical arrangement.
I think a big issue with the sliders going horizontal is reading the selection names. Compare a list of names running up and down vs left to right. You'll find it much faster to scan from left to right and vice versa. Like reading tabs in a web browser.
The other issue is just visually I find it hard to compare the position of the prices when they are arranged horizontally. They seem separate from each other. Whereas vertically they feel linked together as they should be.
I don't think it would be very hard in the programming to change the orientation of the sliders. Just about everything else is there, just need to rotate it. I've considered rotating my screen but then my mouse would be out
