Seatgeek is a huge waste of time and borders on a scam. If you order tickets for an event, it does not mean you will get the tickets. Sellers can post tickets that they don't have or are trying to sell at multiple prices. You place an order, pay and assume that's a done deal but then the seller can decide not to sell you the ticket (because the price is too low or they don't actually have the ticket) and you are stuck.
Worst of all this process is not instantaneous. I bought last minute tickets and didn't find out that SG didn't actually have the tickets they listed and accepted payment for until after the event had started. Nothing online or in my account said "sorry tickets not available". I had to call to figure out what the deal was. If SG had immediately let me know that the ticket listings was a scam, I would have found tickets elsewhere. Instead, I had to call to discover that despite selecting tickets and paying for them, I really didn't buy tickets at all. Meanwhile the event started and I had to find a more reputable seller.
Don't waste your time with this untrustworthy and dishonest service. You're get more reliable service from the guys hustling in the parking lot.