Definitely buy. Very promising coin. I like the idea behind NEO-smart contracts of a new generation for the Chinese market, a practical attempt to create a digital economy with the help of blockchain.
NEO is also a very good coin to invest because I think it is likely to grow to be equivalent to ETH. NEO is receiving great support from Asian and Chinese investors, its management team is very professional and currently NEO is being used as a platform for many well-developed ICO projects.