Giga-watt is legit buy miner from them n store it there i would suggest dash but now its out of stocks but i have 2 i can sell them to u if u wan them look for my post + PSU and delivery included i personally tested them and its working awesomely fine.
Just use coinwars and put with pool fees 3% dont put electrical all the rental price is est rounded up $150 see monthly u will earn how much and u deduct (calculated price - rental = profit )