I purchased my first Tablo 4 years ago, and it still works great today. I purchased the 2nd one about 2 years ago, and it works great. Granted, I have ethernet running to most of my devices, and use a top of the line Netgear Orbi AX6000 (overkill for my home).
I also have two HDHomerun network tuners. I never have issues, wired or wireless on my non-Roku based clients (PC, Android, FireTV, XBox), and occasionally have issues with Roku (Ultra and/or Streaming Stick +). It happens both on the Tablo and HDHomerun DVRs, but never on other streaming devices.
Being part of many other tech support boards, Roku seems to have difficulties with “live TV streaming” (from a network device in your home, not YouTube TV, Hulu Live TV, etc). It has great difficulties with ATSC 3.0 channels (no audio, frequent buffering) with my HDHomerun DVRs.
FireTV never has issues (both of my FireTV devices are wireless) with either product.
I have also used Windows Media Center (with XBox360 and HDHomerun/Cable card) and TiVo (both antenna and cable card setups).
With all those products in my house, I still use the Tablo DVRs as my primary DVR for recording programs. With all the gadgets I have, I say with 100% confidence that the Tablo DVRs are the most reliable and have the best DVR experience compared with all the other devices I have.
It does have glitches once in a while - but so does every other product I have used, including the Cable/Satellite Boxes I have used over the years. And compared to all the other products, Tablo has performed the best. Most people that ask me - I recommend the Tablo DVR to them, and they simply love them.