Does 100 users represent a small or a large portion of the total addressable market? If it's small, just ship it. If it's a large portion of your addressable

Does 100 users represent a small or a large portion of the total addressable market? If it's small, just ship it. If it's a large portion of your addressable market, then choose 5-10 of them and give them early access. Either way, be up front about all the known issues and your plan to solve them over time. Keep in close contact with your users and gauge their reactions. If the pain point that you're addressing is large enough, there's a good chance that a product that works 25% of the time is better than no product at all. If, on the other hand, you learn that the product is too frustrating for them to use, at worst you've only burned through a small fraction of your addressable market. And honestly, you can probably gain a good percentage of those back once you do perfect the product. I also wouldn't be too worried about someone else coming along, scooping the product and beating you to market. You've been working on it for years and you still haven't perfected it. That suggests a certain degree of technical aptitude is required to build the product so I doubt anyone can swoop in at the last moment and steal your thunder. The only way for that to happen would be if there's another team already building a product similar to yours in which case, yes they might beat you to market. But unless there's a network effect involved, the better product of the two will likely win out in the end regardless.