Yes its great and I have used them before and got confirmation on my transactions within few hours during huge congestion on bitcoin network.
But you have to be first 100 users to successfully include your transaction in their queue, this resets every hours (GMT time/Forum Time)
No doubt, I have used their service before and was able to get confirmations and good thing it is for free. But as you have mentioned, they only accepts first 100 users so you have to wait before getting your transaction to be confirmation. But it really works.
Well fellas, it took two different transaction about an hour each to get just three confirmations. Does this have to do with the fork? Or is it because a lot more people are using bitcoin?
Why are blocks so slow? Because a lot of miners (most associated with Bitmain) are mining BCash since it's slightly more profitable atm.
there are ~79k transactions stuck in the mempool. 104 blocks have been found in last 24 hours instead of the normal 144 blocks.
That's 40 blocks less (in 24 hours) than during normal 10 min blocks. With ~2000 txs per block that's roughly ~80k txs, so no more backlog. And Segwit might be active, many exchanges and wallets haven't switched yet to segwit compatible addresses, I expect that to start next week.
I think Antpool is mining empty blocks that's why the network is congested. I don't know what they don't mine using Segwit software as it was agreed up and it seems that they are doing is on purpose. On the other hand they are losing $100K for not mining Segwit transaction. We may never know the real reason behind why they are acting like this.