Used one tube to repair seven 13x13 tiles throughout my house (still have half a tube left). This product worked awesome and saved me a lot of work as I didn't have to replace any tiles. Would recommend this to all, if you can follow simple directions it will also work for you. One tip I would add, after drilling the holes in grout I used a scribe to ream out hole under the tile (this ensured glue would flow under the tile).

Surprisingly good sound quality giving the small size and low price point. My commute to work is 15-20 min, 5 days a week and I haven't had to recharge yet (had it for about a week now). Build quality isn't amazing but feels like it should last if you're not to rough with it, we'll see once I have it for a longer period of time.