Pros
If you are unemployed with few prospects and looking for a thankless job with no annual raises, no cost of living raises, just pretty much no raises at all, then Zayo might just be for you.
Cons
Most everything you've read here is true. Few pro's, many cons. As I write this 72% of employees would not recommend Zayo to a friend. 67% do not approve of the CEO. This alone should give you a pretty good idea about working at Zayo. Why so low? Understaffed relative to workload. Unclear policies and procedures that are haphazardly implemented and are often either ignored or subject to change on a whim. High turnover adds fuel to the misery. Compensation is a sleight-of-hand moving target designed to provide Zayo with multiple avenues to avoid paying employees. Bonuses rarely pay anything close to target goals. Stock grants that are earned from previous quarters are left on the table when employees leave. Meager 401K match not funded until July of the following year (could be as late as September). Accrued PTO which is earned on a paycheck to paycheck basis is forfeited upon termination except in states where Zayo is absolutely forced by law to pay.