There are a lot of pros and cons in kitchen designs no matter what option you go for. Whether you want a prefabricated kitchen design to save you time and energy on deciding, or if you want to spend the time refining your options so that your left with what really suits you, you will likely encounter both things that you appreciate from the process and things that you hate.
A bespoke kitchen design has a number of pros to the process. Firstly, it usually comes with a more personable service which is amenable to your wishes and needs. This is likely going to give you a better result, or a least one which contains all that you want from a kitchen. It also gives you the opportunity to match the style of your kitchen to the design of the rest of your home, when that design may be too individualistic for it be represented in a catalogue.