OP, one thing you might want to think about before purchasing a flex ratchet is what it will mainly be used for and whether you really want it to have quick release. I am a quick-release ratchet lover, but only at certain times. There are jobs that require constant socket switching, and having a quick-release ratchet for those jobs makes things much easier and faster. It's also a nice feature to have when my hands are really greasy. That being said, I only own a couple quick-release ratchets and none of my flex ratchets are quick-release.
In 1/4" drive, I ended up the happiest with a quick-release TR72 as my main everyday ratchet, and I don't own a regular T72 at all. I also have a HF composite quick-release ratchet that I use quite often. The rest of my 1/4" drive ratchets do not have quick-release. I never put my hand or fingers on the back of the ratchet head when using a standard length solid handle ratchet so the quick-release button doesn't get in the way.
I am actually happiest with a TF72 ($45-50 shipped for lightly used on Ebay is possible with a little patience) as my main 1/4" flex ratchet, because it gets into tight areas better, and I found that in open areas I like using that ratchet with my 4 fingers around the flex handle and my thumb pressing down on the back of the ratchet head. I almost always want at least one finger somehow on the back of the ratchet head to help hold the head in alignment with the fastener when using that small ratchet. I tried using quick-release flex ratchets originally, but I found the buttons got in the way more often than they helped. If someone made a high quality flex ratchet with a flush mounted quick-release button it might be a different story, but I haven't seen one.
In the larger drive sizes, I don't use quick-release flex ratchets because in tight areas I often find myself slipping a hand, pry bar, small piece of wood, etc. down behind the ratchet head to press and hold the head firmly on the fastener while I torque on the handle. That prevents socket geometry issues when torquing that might damage a fastener head. In those situations a quick-release could get in the way or become damaged too easily.