If you cant afford it, don't get it
As much as I like glass, it is expensive.
Tiles would serve the same purpose at a fraction of the cost.
Use the savings to spend on things that really matter in a kitchen, the appliances and proper saucepans. These will save you time and give you enjoyment out of your kitchen.
As matrix mentioned, the 300x600 tiles do look spectacular and have 1/2 the grout conventional square tiles do. They are also cheap enough to replace if you need a make over.