I've used Premier 1 and loved it, until the flock started flying over it. I lost 3 birds in as many weeks to northern goshawk. The hawk did not take any birds inside the electronet. I then built a 500 s.f. run and covered that with bird netting. That worked well till snow season ripped it part way down. I removed it. I was lucky enough to be watching when a huge hawk flew down into the run to get one of my birds. I chased the hawk away. Then, hubby and I blocked off one bay of the run, and covered that with a combination of peaked roof and green house tarp, and 2 x 4 welded fencing. No more hawk attacks. I have to open up the rest of the run every spring, and re-install the bird netting.
Premier 1 Pros: Easy to use, can be moved. Keeps all land predators except for weasels and rats out.
Cons: Must be cleared of vegetation. I'll not use herbicide, so every few weeks, I had to move the fence line and mow, then restore fence line. Will not keep hawks out. Birds can fly over it. You could get around this issue by making your electronet run small enough so that you could put bird netting over it. Chicks can run through it until they are about ?10 weeks old.
Stationary fence: I can't afford hdw cloth b/c of the amt. of sq. ft. of run I need. 6' tall chicken wire, with horizontal skirt works fairly well for my purposes. I have to knock snow load off even the 2 x 4 grid several times/storm.