I chose this mat because of the large pieces (other mats had smaller squares and dozens of pieces-a nightmare to put together everyday) but I was dissapointed to find that the speakers cracked. When I found this product, I was so excited to find such a large mat, I overlooked the fact that it takes 14 AAA batteries. The manufacturer stated that it comes with alll 14 batteries, but mine only came with 2 for the first mat. The mat is excellent quality, but the speakers aren't. I am taking mine back after only having it 2 months.