With all due respect to Dan Larimer, I'm not saying don't do it, but I am saying, be aware of the these issues. I will not be buying.
EOS token are not tokens on the EOS platoform. They are ERC20 tokens on the Ethereum blockchain. Meaning these are contracts programmed on the Ethereum blockchain (ledger) and are not related to the EOS blockchain. Why not on their blockchain? Do they not trust their own blockchain? Read their FAQ.
A lot of Ether is going to be locked up for a whole year, and in the hands of a single company, allowing them to at any point crash the price of Ether, or perhaps use Ether to keep up the price of their token - thus rigging the market.
The terms and conditions on their FAQ state the tokens you are buying are not connected to the EOS platform, and do not guarantee you anything on their platform.
"The EOS Tokens do not have any rights, uses, purpose, attributes, functionalities or features, express or implied, including, without limitation, any uses, purpose, attributes, functionalities or features on the EOS Platform."
EOS is not a mined coin, and they reserve the right to inflate their tokens at will. And, t hey are going to be "disributing" 1 billion tokens. That's a lot of tokens. Given previous concerns, definitely a red flag for me.
You don't know how much you're paying for EOS tokens ahead of time: "No, it is not possible to know the price of a specific period until all ETH is received for that period ..."
It sounds like after a certain date, you won't be able to transfer (sell?) your tokens: "EOS Tokens will become fixed (non-transferable) on the Ethereum blockchain within 23 hours after the end of the final EOS Token distribution period which will occur on June 1, 2018 at 22:59:59 UTC." Maybe I'm misunderstanding what they mean, but that doesn't sound good to me.
Any potential value of your tokens depends on people developing software on the EOS blockchain... eventually. It sounds like they're trying to compete with Ethereum, while riding the Ethereum blockchain.
This isn't to say the EOS project will fail, but it sounds very risky. And it's too much risk for me.