I like that it's easy to use, you don't need much coding experience or background in physics to get started with! It also has some great inbuilt tools for simulating fluid flows so no more having to write your own code from scratch - everything comes out of box now! There are ways round this but if there isn't something specific required then just go ahead using what they have provided as its all very well thought through :)I dislike how difficult it can be at times to debug issues especially when things aren't working correctly so make sure you spend time getting familiarised with their documentation before diving into anything too complicated / advanced!It does require quite good computer power which may not always suit everyone who wants/needs to work on projects such as mine. We're modelling flow simulations within oil reservoirs where we simulate millions upon billions of particles over many years (we've had 1 billion particles running since early 2016).