I tried it few times and it was working properly.
Pros: ease of use, you can have old computer, based on world most powerful solvers
Cons: some complicated simulations can have problems
But if you will be FEA/CFD analyst, you need to know what are you doing.
Conclusion: You need try it, it is based on world most powerfull solvers, so when you know what you are doing, you can get great results with simscale.