I also have to question whether this is really good from a business perspective. "First mover advantage" really is overrated. Rather than cutting corners to launch your product a couple of days sooner, perhaps you should be focusing on the long term.
Granted, there are all kinds of caveats we can think of. For example, very early startups don't have the option to focus on the long term and just need to ship something. But even then, putting in a little bit of time up front to polish your code will greatly help your velocity for your next couple of features. You are planning on having more features past the first couple, right?