Almost immediately after taking the safety off, the fire selector on the left side broke off, the other one works fine, but it's still strange because it happened almost as soon as I took it out of the package. I attached a photo just in case. Aside from this detail (because other than that the replica works perfectly), I have nothing to complain about, the replica is very well made (except for the left fire selector), from a distance you can't tell it from a real MP5SD. Above all, it's durable and indeed very well balanced. So to summarize, I recommend it, unless you are left-handed, then I wouldn't buy it in your place (unless I just got a faulty unit), because I assume you would struggle again as with other types of replica weapons.