Ventajas
You get salary on time. That's it folks.
Desventajas
Well, where do I start? you're hired and they'll tell you all fancy buzz words about 'innovation', 'changing the landscape of internet', 'competing with google' bla bla. Now you join, and guess what? immediately you're expected to give same output as someone who's working there for years; without any proper knowledge transfer, process or anything. No session on architecture, no brain-storming but you're definitely expected to know everything from scratch. oh did I forget to tell you? you can't even take your own time to learn, cause it has a 'critical' deadline. All in all, you'll hear everyday how you're not performing 'as expected'. Manager/Lead will always try to make a soft target out of you, since they've to save their job. Few months later, you might hear that company is not making any profit and you've to leave.