1. How does the card stand compared to other Trainers/Supporters/Stadiums? Is it good, bad, or have potential? Is it worth being played?
Lack of flexibility makes it pale compared to Palmer's, especially with so many trainers and supporters that get energy back. I can't see myself using a supporter slot this way, but I can see some decks that may use it.
2. What popular metagame decks could it be used in?
Tyranitar maybe. It's main attack mills, so shuffling six cards into your deck to buy time could be really handy. Yanmega too, though I don't know how much I would call either "meta" at this point.
3. What combos can you use it with? How so?
FSL + Sunshine Grace. That's really it. Unfortunately the only decent deck that can use that is Yanmega, which doesn't exactly run a lot of energy.
4. Give it a rating, and explain why you have given it that rating. You can also rate the card by rating the thread itself (out of 5 stars).
Putting six cards from the discard to the deck sounds awesome, but the lack of flexibility compared to Palmer's really smarts. Decks that don't rely on a lot of energy can only rescue the three pokemon, and with trainers like energy retrieval this card's recovery becomes really inefficient. I can see it being useful, but it's no Palmer's and certainly no Night Maintenance. Palmer's you could get away with running one of due to commonly available draw power and card flexibility, but in the current (albeit soon to be rotated) meta, loss of flexibility makes it shy compared to Palmer's, and in next format, one FSL won't cut it and two is probably not worth the card space.
In hindsight, it might help Yanmega a lot with Sunflora being to Sunshine Grace and all, and this is one time running two of them might be worth it.
2/5 overall, but I might say 4/5 for Yanmega.
5. How's the artwork?
Average. 3/5