To answer the OP's question, I think it's important to decide on what features you need and then shop accordingly. You should also adjust your expectations based on price...you have a right to have higher expectations from a more expensive product than an inexpensive product. I have several instant read and non-instant read thermos, but this is my current favorite:
Why? Because its high contrast display is so easy to read under any lighting condition, it's magnetic so it sticks on the side of the microwave, and it reads temps very quickly. The black color makes it stand out from the others for me, too, so it's easy to find and grab when I forget to take it out with me, and I like the way the probe opens and closes smoothly. You can probably find the same features from a lower-priced product, if a low price is your objective. I should note that I bought this during a special sale and paid $27 for it.
Like many people, I use an instant read to verify the reading of another, in-dwelling thermometer that I use for my "cook to" temperature. I think it is a "good enough" product for what I use it for.
Yes my primary use of my current fav Lightning is to verify readings from either the wired ones on the Z Grill or my (now useless) Chef IQ wireless, and my still working just fine TempSpike ones. Or to verify temp of a pan on the stove, what have you. I rarely use it anymore for doing actual "cook to" temps, But of course I still do occasionally