1) will my birds be escape artists with the fencing?
I've used Premiere1's 48" high electric netting for several years. The chickens fly up to a 5' high roost so they can easily fly over it if they want to but for the most part, they don't. About the only times I have a problem is when I have several cockerels in there. When they get into their fights if one that is losing is trapped against the netting and can't run away it goes vertical to escape. Sometimes they land on the wrong side of the netting. No, they do not know to fly back in. I had one hen escape, I think she was trying to get away from an amorous rooster. My main flock doesn't fly out, the immature cockerels sometimes do but that is by accident.
How you set it up makes a difference. Avoid sharp corners. A 90 degree corner is OK but anything sharper than that seems to trap them against the netting. If you can make them flatter, even better.
I had a problem when I tried to make a narrow corridor to lead them to a new bigger area. I can't remember how wide it was, probably around 10'. All of a sudden a lot of cockerels were getting out, three in one day. I quickly reconfigured it so it was wide, nothing narrow at all. The escapes stopped. You only have 82' of netting. If you can avoid sharp corners and narrow spaces you should be OK.
2) I saw on another thread it did fantastic at keeping the foxes at bay which is my main problem. But will the foxes dig or jump the fence?
My netting has stopped all ground-based predators that have tested it. That includes any digging and jumping predators. All the horizontal wires are hot except the vey bottom one that touches the ground. When a critter touches a hot wire and is standing on the soil it completes the circuit and gets shocked. A digging predator is going to get right up next to the fence before it starts and may try to push its way under the netting. That gets it shocked. A jumping predator will inspect the netting before it jumps, usually with a nose or tongue. It runs away instead of jumping over. Just because they "can" jump over it doesn't mean they will.
Your coop and run will not be electrically protected. A climbing predator like a raccoon or a bobcat could climb over you coop and run and climb down inside the netting. Mine is set up the same way and that has never happened, but I always lock the chickens in the coop at night because I don't consider it totally predator safe.
If the hot wires are grounded you lose protection. Grass or weeds can grow up into the hot wires. Wen it rains they can short it out. Wind or a flooding rain can blow or wash dried leaves, cut grass, or plastic bags up against the netting, shorting it out. It does require maintenance to keep it from shorting out.
Do you have the instructions that come with the charger? What do they say about weather protection? If you don't have them, can you find them online? You can ask the manufacturer about that, maybe e-mail of a phone call. Go to the source for that specific unit.
Like everything else, electric netting is not perfect. But if you et it up correctly and maintain it then it can be very effective.