We would always recommend some sort of protection for the wall covering at the back of worktops. 10mm coved upstand is the best choice to meet glass or tiling. A 50mm upstand is a popular choice for a decorated wall. Often splashbacks are specified much higher than this, especially in the hob area. Coved upstands, although more expensive, look beautiful and give a stunning finish to your installation. They also have the advantage of making cleaning much easier - preventing dirt and grime collecting at the wall/worktop junction.
Used to make an easy clean junction between horizontal and vertical surfaces. Prevents water damage to glass or mirror splashbacks.
A good choice to protect decorated walls
Typically up to wall cabinets or an extractor. Can also be used to make a neat line with a window board.
A cheaper alternative to coved upstands
Useful to protect the wall behind a hob