I’ve been on 1and1.com for about 8 years. Not the best first-line customer service (offshore mixed with local). But for the money they’re WAY better than nickel&dime GoDaddy for email count, storage. I haven’t used the 3000 emails you get with it.
Our business has been a 1&1 user for a decade now. We have not experienced any problems during that period. I think they provide a good product.