Liquid was one of the exchange I have used in the past. I am using different exchanges now but my experience with liquid was overall positive. They have reasonable amount of crypto to offer (could be more). The exchange seems secured, user friendly and is regulated. Examining fees, they could be lower.
The problem is that it is not mainstream exchange so they have small user base and some crypto has low volume of trading. They have implemented great fiat gateway which you can use for buying crypto and start trading.