Genesis-Mining are trust worthy and prompt.
I have taken 300$ contract of X11 - to mine DASH - 9000MH/s. After maintainence fees, I am getting more than $1 worth of coins every day. This runs for 2 years, so effectively more than double the investment.
Note that currently coin prices are low. Daily maintenance is adjusted before giving the daily output, so if the coin price is high, maintenance (in USD) will be lower in terms of Dash. So expecting a significantly higher profit if the coin value increases.
You can use the promo-code of PXosrj for getting a 3% off of any contract. Any other mining code offering more discount is a fake propaganda.
Even recently, Hashflare contracts were cancelled due to low outputs (restore again after few weeks) but Genesis outputs have been consistent.
During April2018 to June2018, XMR contract output were very low in Genesis-mining. This was due to the fork of Cryptonight V1 algorithm. After the shift to the new algorithm, the outputs have regained in strength and genesis-mining has also given 3 months extension to all the existing XMR contracts to cover the losses for that period.

Please let me know in the comments if you use my code, I will use your code in my next purchase(of course - share your code in the comments).