Should be, they probably build them all to the reference design.
It all depends on what you need it for. If you need the precision of a 6.5 digit meter, you would never use this junk. For my model railroad stuff, all I care about is if it's in a reasonable range - since the signal is a varying duty cycle square wave, getting an absolute accurate reading isn't easy even with an expensive meter, but all I really care about is that the reading is consistent in all areas so I don't have weird speed variations. If the meter reads 5V, or 20V, I know something is wrong. If it reads somewhere around 12V, it's good - 11.9, 12.4, 13.2, I don't care - as long as everywhere I take a reading it is that same value. For that, these el cheapo/freebies work great. If I knock it on the floor and it breaks, or if a blob of solder falls on the display - no big loss, just pull out a spare and carry on. Even these meters beat my very first one - it was the little blue cheapie KIT analog one from Radio Shack. Might have been about $8 US at the time. It MIGHT have had a 1K input impedance. But very fancy, it had the mirror through the scale so you could correct for parallax.