You can't beat free!
It does have its own sound, and right now, with the humidity indoors at 68% (did laundry, sheets are drying, no dryer connections in this building and it's raining outside), it sounds more consistent than my Koaloha. If I take my Koaloha out, it sounds a bit sad... which is normal for a temperamental wood instrument. I store it in the case simply to protect it from the humidity at this point. It works, the humidity in the case is 55%.
The humidity of the flea's case is the same, but I can take it out and even though the only bit of plastic on it is the nut, saddle, and back, it's enough to be more conistent.