I am a newbie to RC copters.  I have very limited knowledge like some of the RC copter heroes that are posting reviews.  From my perspective this is the best $23 I have spent in a long time.  Out of the box it was perfectly calibrated.  After a few small crashes I started to get the hang of it in about five minutes.  After my first few five minute flights I was able to put this copter through the paces of flying it around my log ceiling house.  After two days I was dive bombing my wife, cat, and kids with precision.  I have smashed it into furniture and walls a few times and it just keeps going - very well built.  As other posters have noted you can't fly this outside unless there is zero wind and even flying inside near a running AC vent will throw off the trajectory so its very sensitive to air flow.  I loved this thing so much I bought one for my office and now all of my staff want one.  If you order one and like it then I would consider ordering a second one so you can get more flight time and if one breaks you have a back up.  I don't really recommend ordering parts to fix one as once you order the parts for $5 you are pretty much 25% of the way to just getting another one and you have more flight time since 40 minutes of charging grants you about 5 minutes of flight time and you can't change out the batteries.  Stop thinking about it just order one - they are awesome.