What do you like best?
My company has been using Pair since we started our business in 2015. We decided on them as our hosting solution because the company I previously worked for used them, and they were very happy with the reliability and security of their servers. During my 8+ years of experience with Pair, our servers have never unexpectedly gone down -- not even during Superstorm Sandy!
What do you dislike?
They are a bit expensive, although I can't really complain because we are getting what we pay for.
Recommendations to others considering the product
Pair is a great choice if you're looking for a reliable hosting provider for a database-driven website or for your organization's email.
A recent security enhancement: If you have an SSL, they now automatically redirect traffic to the secure version of your website. In other words, if you went to http://yoursite.com, it will automatically redirect to https://mysite.com (same applies to all pages on your site). No htaccess coding required!
Regarding email administration, they have a good interface for setting up mailboxes and recipes such as mail forwarding. You can place a maximum size on each mailbox and choose how it handles junk mail.
What business problems are you solving with the product? What benefits have you realized?
My company has a dedicated server which hosts our clients' websites, email and SaaS systems. Among the benefits we and our clients have realized are the speed and security of our websites, easy software/hardware upgrades, and quick turnaround when installing a new client/domain/SSL.