CONS:

Performance:
An MFD won't always be able to match the performance of its standalone counterparts. For example, MFD printers are not always able to handle envelopes and labels like a standalone printer. They also typically lack the variety of paper trays and fonts you might expect from a similar printer model. As scanners, MFDs do not offer the resolution that a standalone scanner model would provide. Scans tend to be adequate for simple images and text, but poor for photos and other detailed images. In terms of copying, most low-end MFDs lack basic copier features such as sorters and zoom. In addition, the image quality is not as good as an individual copier, since most fax-based scanners only capture about 300 dots of information per inch.

Cost-benefit ratio
The full potential of multifunctional devices is still unexplored as users are still unaware of the price and performance benefits that can be accrued by investing in these devices as opposed to a standalone device. The challenge is to educate the consumer of its advantages.

Breakdown:
A major disadvantage is that the entire device is covered under a single warranty unlike standalones. In case of a breakdown, all operations come to a standstill.

Lastly, an MFD is an option for those who need all the functions. There is no sense investing in an MFD if all you need is a printer and copier mainly because an MFD cant match up to the capacity of the individual devices but they are extremely economical and practical if you need all the functions.