What does 1&1 do well? 1&1 started as a hosting provider but now provide everything under the digital sun. They are one of the largest domain registrars (and typically include 1 year of a new domain free with hosting purchase). All their products are integrated, which is a pro for many people
What does 1&1 not do well? Nothing
What do you wish you had known about 1&1 before using? Nothing, You can use it whenever you need it.