What makes a good cover?
Policy benefit limits will be different between insurers. You should look out for benefits like Alternative Accommodation and Hidden Gradual Damage and see if they are enough for you.
Conditions between policies also vary, but are less obvious. For example different conditions will apply to unoccupied houses.
Extra benefits like nil-excess glass cover can add value to your policy. These are often optional benefits, so you should check they are included when comparing price and cover.