Per my ten flights this year with them (out of BWI, Miami, Vegas & Reno) it's a Pay less and get out the airport quickest experience. Their planes i flown on are new planes with seats that are a bit less comfortable. Their refund policy is awful ..just don't cancel.
Theres tons of negative press about them and I bet a lot of it is stirred up by fake news marketing via their competitors. TikTok has lots of influencers / social media professionals trashing them with their fake news marketing videos (like a few such tikTok(ers) have millions of followers).
If JetBlue buys them no more cheap good flights and that cuts out a lot people who can afford to fly with them now and that's crap..flying/traveling should be affordable for many not just middle to upper class!