I have one of the older Gourmia 1200 Watt units with no bluetooth, etc. And it has been fantastic for years. I do open it and clean it fairly often, and I'm sure that helps.
I got two of the 800 Watt Anovas this past Christmas to give me more power if needed for a big job. They worked fine, but I've only used them that one time.
All of these have been amazingly accurate.
One thing I like about the Gourmia (and maybe the Anovas do this, too), is that it can be set all the way down to 32 degrees F (0 C).
That might sound stupid. but I've used it twice to safely but quickly thaw a frozen Turkey by filling a cooler with water and setting it outside when the temperature was below 40 F, and setting the circulator for 40 F. That way, the Turkey was kept at a safe defrosting temperature, but with circulating water transferring heat into it as rapidly as possible to thaw it.
I used a grate from my smoker and a weight to keep the Turkey submerged.
Don't try that if the temperature outside will possibly get above 40. And make sure the rig is in the shade so sunlight won't heat it unexpectedly. The circulator can heat, but it can't refrigerate, unfortunately!
Also, make sure the local critters can't get to your turkey!