Developed over nearly 20 years, FEMdesigner has not only been optimized for speed, but also honed for accuracy. You can trust the answers that FEMdesigner gives you to be accurate.
As every good engineer knows, FEA results are not a substitute for real world prototyping and testing, but with the accuracy of FEMdesigner, your designs will be ready for physical testing sooner, and you'll spend less time testing.
Have a look at some examples of FEMdesigner accuracy in these benchmarks:
Linear elastic, frequency