If you run a small business that doesn't require enterprise-class WordPress hosting, I suggest checking out A2, the category's co-Editors' Choice. The Linux-based A2 offers four excellent WordPress hosting tiers, starting at $7.99 per month, offers unlimited storage and monthly data transfers across the board. The plans top out with the $24.46 per month managed package that includes unlimited databases and websites.
With a 99.95% service availability guarantee, WP Engine has above-average reliability. The company's support portal provides nice access to a knowledgebase for the most commonly asked questions regarding WP Engine services, site migration, and common WordPress problems. In addition, the support staff is available via online chat, phone, and a ticketing system. Furthermore, the folks who are helping you are WordPress experts and can almost always help point you in the right direction.
For this testing, I used a website monitoring tool to track my WP Engine-hosted test site's uptime. Every 15 minutes, the tool pings my website and sends me an email if it is unable to contact the site for longer than one minute. I look at the data for the most recent 14 days for each site's review. In my newest tests, WP Engine proved incredibly stable. In fact, WP Engine didn't go down once during that two week testing period. As long as it keeps on this course, you can count on it deliver a rock-solid Web hosting experience.
Support is probably the feature that will make the biggest difference in your hosting experience. When you need help with your site, you want to talk to tech-savvy people who can solve your technical issues quickly, and are patient to help you figure things out. Since you're hosting on WordPress, make sure the support team is comprised of WordPress experts, so they can fix not just the servers, but the site as well.