Wasn't able to view the videos you provided, but thanks for the positive feedback on the Xi5. It seems to be superior to the MK.
First video was of us staying on a stump within a foot or so in a 20+ mph wind. My partner's shirt was whipping in the wind at the end.
Second video is anchored up in the middle of the Toll bridge that crosses over Lewisville. I stayed within a foot of that column for better than a half hour and caught fish. I have also done it on the 720 bridge. The MK would never do that. You just need to be ready in case you do lose signal because it will kick around looking for a signal (just hit the anchor button once and it will stop.)
The only downside is it is a little slower if you are moving from one spot to another. I also wish they had a digital display on the remote. A little trick is to set the foot remote on and adjust the speed on the dial knob so when you turn on the prop with the hand-held remote, that will be the speed it will turn at.
I forgot to add that they are both equal to deploy and stow in my opinion.