Pros
I've been at Wayfair for several years, and the company supports a great work/life balance, is open to ideas from employees, and makes an effort to make the workplace a fun place to be. I'm especially proud of Wayfair for the way they've supported me through some serious medical issues - they've been understanding about insurance needs, scheduling, and making sure I'm in a position where I can do interesting and useful work while fully attending to my health needs during a rough time. Honestly I can't imagine being in a more supportive environment!
Cons
Nothing that you don't find at any company - Wayfair has grown a lot since I've been here, and while there are always changes that come with growth, I think the culture has been retained much better than I expected.