I like that it can be used for very simple models, as well has complex ones with many different elements (more than 50).
The user interface could use some improvements in terms or simplicity but this does not affect its functionality at all! Use actrans if you need an easy way out when dealing simulating acoustics problems related to your industry/field work area; there are lots features available which make things easier by providing more accurate results while keeping everything within reach from beginner level users too advanced professionals who know what they're doing -it's just right between those two extremes-. It really helped me understand how sound travels through my engine components so i was able determine where would give better performance regarding noise reduction.-The fact we had no experience using Finite Element Methodologies before gave us confidence since our problem fit perfectly into their range,-We were solving exactly one type of engineering question only:-It made calculations much faster compared other FEM.