We've had a 19" Cello now for about 2 years. It works well enough, and contrary to other comments on here and in reviews we have no problems with the viewing angles. We had to have the remote control replaced as it was faulty and the remote is still a bit sluggish to respond. The other downside with it is that it takes about 5 mins to download all the available programs, which you have to do every time you move the MH if you are using an Omnisat terrestrial antenna. Using satellite is no problem as once you have your channels downloaded that is that. The worst thing about the Cello is the sound quality. Ours is now wired through the cab radio and comes through the habitation speakers, which is a far better solution. Make sure you listen to the Cello speakers before you buy!
We are pretty new to motor homes and I recently purchased a Cello tv. As per the above quotes, I agree entirely. The sound quality for the TVs itself is pretty poor. That said, it did come with a free Bluetooth speaker that makes all the difference. Luckily I also had a Bose Bluetooth speaker and when I connect that, it's better than the TVs at home.
It does take quite a while to tune and I pack the TVs away during every move so the first thing I do when we get anywhere is set it up and start tuning then when everything else is done for the particular site it's finished tuning and we can then sit down and enjoy it.
I haven't used the satalite so can't comment but for normal digital hd the picture is very good.
I did buy a hard disk to plug into the USB port to watch stored films but so far I haven't been able to get it to work directly so have had to resort to transferring them to a usb stick. Not much of a hastel as you can get loads on a stick with good memory. I think that this is due to the USB port on the TV not having a power supply like on a computer but I'm sure someone will be along in due course to correct me. As I said, not really a hastel but if we were going away for any length of time we will need to take a laptop along to transfer films on to the stick but realistically we would probably have the laptop with us anyway.
Personally I've had no problem with the viewing angle but I guess that will depend on where it's ultimately positioned. We have a lounge with only one really suitable place to position the TV so it's pretty much set in stone where the tv can go. Most of our camping is wild and the power saving function is very handy as we only have the one leisure
battery at the moment.
All in all, a very good TVs with a lot of features for what you pay for and other than the sound quality I can't really fault it. The Avtex is a better TV but it is a lot more expensive so like everything in life, "how deep are your pockets"??? My thoughts are that having a TVs is a nice luxury but if I really want to watch something particular, we can do it at home during the week and enjoy the outdoors etc on a weekend.
Enjoy
Smudge & Anne x