Yep, the Gel cups make a big difference to the comfort, fit and sound suppression so are a worthwhile addition. They’re listed as 27db SNR but they feel better than that with the Gels.
I settled on a pair of the Advance 2’s with a 33db SNR to replace my aging Peltor EEP 100’s…..the supplied tips are on a par with the cens Mino tips.
Their Admin is good and quick to reply to any emails too

They do Special Offers now and again if you subscribe to emails.
Cheers
Fizz