Whether to buy an oven with microwave function depends primarily on your kitchen space, cooking frequency, and budget. Combination units offer genuine advantages for space-constrained kitchens: they consolidate two appliances into one footprint, deliver a streamlined built-in aesthetic, and provide versatility through convection, defrosting, and reheating in a single unit [1][2][3]. For smaller kitchens or minimalist designs, this is a meaningful benefit.

However, combo units come with substantial trade-offs. They typically cost significantly more than purchasing a conventional oven and basic countertop microwave separately [3]. They also have smaller interior capacities than full-sized traditional ovens, which limits cooking for large roasts, multiple trays, or family-sized meals [1][3]. Many models lack a dedicated bottom heating element, resulting in less effective browning for pizza and pastries compared to conventional ovens [1][3]. Repairs are more complex and expensive because integrated components mean a single failure can require servicing or replacing the entire unit [3][4].

Electrical and installation requirements are also critical: most built-in combo units require a dedicated 220–240V circuit and specific ventilation and clearance, so verify your home's capacity before purchasing [1][3].

A practical decision framework: choose a combo unit if your kitchen is small, you want a clean built-in design, and you value convenience and space efficiency over maximum baking performance and budget flexibility. Choose separate appliances if you prioritize budget, frequently use the microwave for many meals, cook large quantities, bake often, or want the flexibility to replace individual units without replacing both [3][4]. If you share your kitchen layout, cooking habits, and budget, more specific guidance on features or models can be provided.