Quantler?? Free cloud based algo trading

Found it online, this any good? They say it is free

Quantler.com

Compatible with over 250 brokers
Low latency (NY and London) - cloud hosted
C# based, and open source
Tick Data support
Simulate latency, spreads, commissions etc…
Modules marketplace
Compare backtest results (showing how small changes can impact results)

Quantler?? Free cloud based algo trading