More often than not, regular kitchen designs are ready_made, so you need to adapt around their layout and design. Hence, many people choose bespoke kitchen designs because of the freedom to select the design details as well as setting the layout of the kitchen according to your preferences and needs.
What are the advantages of an online kitchen design service over simply calling somebody in to do it for you? Cost is one benefit: it is a lot less expensive to do it yourself online than for somebody to come to your home and do what you could do just as easily yourself. Another benefit is that you get exactly what you want, and you can't blame anybody else if it is not to your liking.