Right now its not worth to buy Ethereum Cloud Mining from Genesis Mining as cost is quite high
 
1 MH/s cost USD 44 for one year

if you see this ether calculator

http://badmofo.github.io/ethereum-mining-calculator/

Month    0.991780    $5.14

you will generate this amount ..

so you need 9 month to get ROI ..so which is not worth to buy it right now as per the price rate ..

Once it lower you can decide ..