This is a matter of opinion but you can make an informed decision by considering the following:
What experience do they have?
What size vehicles do they operate?
What do other customers think of the company?
Do they have reviews across a number of platforms?
How do they make me feel when I talk to them?
Can I trust them with my possessions?
How do they protect my home and furniture?
Do they offer anything different to another company?
Are the competitively priced?
Has anyone I know used their service?
Do they travel further afield?
How many staff do they have?