I've been hearing gross stuff about Bitcoin Fog, and they are the only tumbler I've used. With recent complaints of "not receiving $1000 of bitcoins" or super slow delays in general for transactions with 40+ confirmations I don't think I'm really interested in giving them business.
On that note, what are the alternatives? I haven't heard too much about any other reliable, (relatively) trustworthy tumbling service. Thanks.
I don't really trust any of the online tumblers. The shared send feature of blockchain.info is nifty when it works. Part of the problem is that I'm rarely moving more than $100 worth of coin, and a lot of the tumbler sites have higher withdraw minimums than I'm even transferring. Here's a new method I've been toying with that works even better than a tumbler IMO:
Create two separate accounts on an exchange like cryptsy or kraken that does high volumes of altcoin trades.
Buy your bitcoins from coinbase or other site and send them to an anonymous blockchain wallet.
Send bitcoins from the blockchain wallet to your first exchange account
Trade your bitcoins for an altcoin like DarkCoin, DogeCoin or LiteCoin and send your altcoins to an anoymous wallet.
Send altcoins from anonymous wallet to your second exchange account
Trade your altcoins for bitcoins and send your bitcoins to a different anonymous blockchain wallet.