Avantages
None. They claim innovation, but the latest "innovations" have been Nextplus a crippled version of textPlus but with stickers and GIFs!, voicemail (first available in the 1980s), Lucky Call where you are connected with random people (every pedo's dream), and Risky Pix which sends random pictures from your phone's library (another pedo wet dream).
Inconvénients
If you have any intelligence you will be beat down by the VPs who are apparently the most intelligent beings in the universe. There's so many VPs and Directors here, the place is a title factory.
It's a dying company only on life support by investors whom are obviously being mislead. The daily active users is falling everyday, 50% of new users don't open the app the next day.
If you're offered stock, like we have been offered again recently, before you get excited exercise your third-grade math skills. Look at TechCrunch at the amount of money raised in investments, there are several more that aren't there, then look at the revenues each year and you'll be able to quickly see that recycling the stock paperwork will pay you more.