Time Expectation 6+ Months
Pre-orders can take upwards of 6+ months to produce at the least, if not longer. It can vary depending on the overall complexity and quantity being made. Unexpected delays may occur as well. Quality pins (and products) take time, and rushing a manufacturer will result in big, noticeable mistakes and ghosting.
No Refunds
Once you've paid for a pre-order, you will not be able to receive a refund, as all funding goes towards production (the funds are with the manufacturer).
No Exchanges
Once you have chosen your variant, you are locked in. You cannot exchange for another variant as the manufacturers are set in their quantities.