To put it in simple words, solo microwaves are designed to carry out basic tasks that include defrosting and reheating food, whereas connecting microwaves are much more useful as you can get many additional cooking options such as baking and grilling. Now, it is up to you whether you want a simple solo microwave for basic tasks or a convection option, which is advantageous for eventual baking and grilling. We will recommend you to go with convection microwaves as you get all of the basic features and still has an option available if you decide to cook exotic food on a free day.