It definitely has its quirks, but ultimately it comes down to personal preference and what you're trying to accomplish.
All-in-all I like the iX Developer software.
I would recommend downloading and using it yourself, it has a fully functional 30 day trial. https://smartstore.beijerelectronics.com/
I'm not too familiar with IX but used the E series for many years and found them great and reliable. I'm now retired but before I did I downloaded a trial and for me it seemed fine, perhaps I'm used to the way E-Designer works.
We had a number of the newer IX panels supplied on bought in machines and in three years had no problems with them.