There are probably legal issues with your claim as well. I'd just say that it's very unlikely to have adverse effects instead of "it is completely free of adverse affects".
The WakeMate wakes you similarly to how you would wake if you did not set an alarm. That is why it is very unlikely to have adverse effects.
Regarding your comment: "I think the original commenter gets that you're just waking up a little earlier, but consistently doing that every day isn't natural." It may just be because I'm familiar with the product but it doesn't seem to me that setting your alarm for 9:00am and waking at 8:55am can be construed as unnatural.
What is the size of the effect in the research?
"1. The optimal wake feature reduces daytime grogginess only in the sense that it puts you in a better mood in the morning. 2. Yes it is very unlikely to have adverse effects. You are just waking a little bit earlier at a point where your body feels more inclined to wake up."
Two claims. No data from either published literature (from other studies) or their own data. How do they even know it works? Why should we treat it any differently than claims of magnets improving your sleep? A free pass shouldn't be granted just because they are YC.
1. The optimal wake feature reduces daytime grogginess only in the sense that it puts you in a better mood in the morning. Attacking daytime grogginess is something we address with the analytics portion of our product.
2. Yes it is very unlikely to have adverse effects. You are just waking a little bit earlier at a point where your body feels more inclined to wake up.
Your last question:
The optimal wake portion of our product is addressed towards people who don't particularly like waking up in the morning. If that isn't you then no, it probably isn't that useful. The other part of our product, the analytics portion, is addressed to those who want to improve their sleep quality so they can feel better rested throughout the day. It sounds like that is more what you are looking for.
tl;dr The WakeMate wakes you up at the optimal time so you feel refreshed and provides sleep analytics so you can maintain that fully rested feeling throughout the day.