I’ve tried them and couldn’t get used to them.So true. It will depend on where on your teeth you clench down. If carried further back on the jaw, it can be more manageable.
At least for me, after a while on a good rubber bit, you do get some compression, and the bit forms to your teeth impression. It becomes almost custom-fit to your bite. Then it's smooth sailing! I find the first dozen or so smokes on a fresh bit to be a little less comfortable until that happens.
Either way, the comfort cannot be beat, especially on the plastic stems.