I rode 10 years on twist grip shifters, and recently changed. I prefer the trigger shifters.

However, the grip shifters work fine, and except for the occasional accidental shift that someone else mentioned previously, I never had a problem with them.

If you have issues using the trigger shifters, then I think that you already have your answer, don't over-think it. Many people on the internet will complain about anything below the highest level components, and since high level groups don't have twist shifters, they are automatically labeled as crap. They have worked well for many people for many years... no need to fear.