Downsides: doesn't get updates for new sets very quickly and uses non-standard set names, lacking most foreign cards
You can also view their store catalog, see the current buyback price, click the Sell us Yours button, and add items to your cart
First strike, haste
Once I do get a chance to fool with it, I will post an updated list and some matchup analysis
While this doesn't means anything in terms of the expected value right now, which is admittedly pretty good, if your plan is to crack a box or two and hold on to the cards, keep in mind that their prices will likely be dropping over the coming month, which means buying singles is still probably the way to go for building a collection
Getting your choice of removing one creature or debuffing all creature tokens in play is a modal spell worth taking