I was pleasantly surprised when I got the instrument, because I read a lot of reviews that claimed it's not so impressive. I have not noticed any glitches unlike what others have reported. The build quality is better than I expected and all the buttons are on the right places like a real saxophone. I took one star off for the sound, because as expected, it's not a sound suitable for a performance, but I'm still pleasantly surprised of how fun it is to play. The sound through the built in speakers is also very quiet even on full volume, which is ideal for me, because I got it to practice quietly, but for some might be a surprise. The only con so far is with powering it - it's powered by 4 AAA batteries, which only last 4-5 hours of playing or alternatively, by micro USB, which is probably better, but keep in mind that you would need a long micro USB cable.