A simple Google search will yield all you need to know. Your posting in a Roku community so of course comments will be biased. I’ve owned about 15 Roku devices in the past 10 years or so. None of them have ever had issues. I currently own 3 Roku TVs, 3 Ultras and 4 Sticks. Never any issues. No one knows your budget or exactly what features you are looking for. So it’s best just to do a side by side comparison right on Roku’s website. Check out this link
https://www.roku.com/products/compare