Vantaggi
Management is attentive. Good salary compensates for weak benefits. If you know what to expect when working for a fast-growing tech company, you won't be disappointed. And if you also know what to expect when that company is owned by a Private Equity firm, even better.
Svantaggi
Benefits are really very terrible. If they offer you equity (via grants or options) please read your Restricted Stock Agreement carefully and pay attention to the Repurchase clause when you join this company. A repurchase option greatly reduces the "value" of any equity offering, be warned and account for that in your offer negotiations. They can and will repurchase your equity upon your departure, guaranteed. Also, there was a big internal push for positive Glassdoor reviews and CEO recommendations while I was working there. Interpret that however you like.