Yeah, I used to do table tests for C23. For example:
The result was this:
I intend to do the same test for the E90 right now.
Regarding the repair and replacement, I can say the following.
I bought a Typhoon H Plus on November 8, 2018. I changed the camera twice and 4 times I sent it for repair. After that, I agreed to pay another thousand euros to replace my Typhoon H Plus with H520. The H520 immediately updated the software and lost the connection to the remote. After the repair, which lasted more than a month, I made one test flight, calibrated the compass, and got "jello" on all the videos. Since buying the first drone I've only made one successful flight and a few successful test flights. Every other flight ended with a corrupted video. At the moment I think the Yunecc drone selection was a very big mistake that I can't fix. The Yuneec Europe offers me to pay another 600 euros for them to repair my drone in less than a month ("priority program") but this is the purest racket.
Regarding the repair and replacement, I can say the following.
I bought a Typhoon H Plus on November 8, 2018. I changed the camera twice and 4 times I sent it for repair. After that, I agreed to pay another thousand euros to replace my Typhoon H Plus with H520. The H520 immediately updated the software and lost the connection to the remote. After the repair, which lasted more than a month, I made one test flight, calibrated the compass, and got "jello" on all the videos. Since buying the first drone I've only made one successful flight and a few successful test flights. Every other flight ended with a corrupted video. At the moment I think the Yunecc drone selection was a very big mistake that I can't fix. The Yuneec Europe offers me to pay another 600 euros for them to repair my drone in less than a month ("priority program") but this is the purest racket.