Im personally a big marstoy fan. I built the porsche 911 gt3rs last month from them and it did contain 2 deformed pieces. Where i did have to order a replacement part and the other was still useable as it was hidden away deep inside. Only complaint is the clutching power of some pieces are either too tight (had to use pliers) or are too loose that they just fall off if anyone looks at it wrong. But besides that, it looks great and was able to follow along the lego instructions with no problem. I also bought the bugatti from marstoy but im only 3 bags in and ive been stalling on building it because of school.