1. The size of the appliance:
This is a very important feature to have a look at. Do you have a small or large family? Consider the chopping, slicing and mixing you want to do. It is possible that all you want to do is chop a few veggies and then a smallish one may suit you. It is also possible that you have a large family and that you want to use your machine for preparing vegetables as well as mixing dough etc. and then you will need a larger one.
2. Attachments included:
This feature is very important as well. Are a variety of blades included and, maybe even a dough blade? Consider the amount of attachments included with a more expensive machine. The more expensive machine may be a good buy, if you are going to receive all the attachments you need with your purchase.
3. The size of the feeding tube:
You also have to consider the size of the feeding tube and whether it has a feeding tube at all! Once again this will depend on what you want to use it for. The best, of course, is a machine with more than one feeding tube so that you can choose the best feeding tube for a specific task.
4. The strength of the food processor and its stability:
It is very important to make sure that the machine will be up to whatever you throw its way. It does not matter how many other features if has, if the motor is not strong enough, it will be useless.
The stability is also important as you do not want it to dance all over the counter when you are using it. Read the reviews of the machine you are thinking about and find out if it is stable.
5. The noise level:
You do not want to go death because of using your machine! So make sure that others think the noise level is acceptable.
6. Ease of cleaning:
For me this is one of the most important features. It is useless to have a fantastic machine, but cleaning up is such big job that it is easier to do the chopping by hand than cleaning the machine. This can very easily happen with a machine that does not have dishwasher safe attachment.
Keep these features and benefits in mind and you will get the best food processor for your needs.