Very impressive out of the box, instructions are very well planned and concise. Very intriguing and innovative assembly. I'm always in awe of the interaction of all the pieces and don't take the designers skills for granted, kudos to them! Very solid build and can take handling without pieces popping off as you work. Pistons worked flawlessly, great rear fork hinge assembly. There are very few repeat parts and steps, not boring. I really took my time enjoying the process and didn't even consider how much time elapsed. A great display piece and the most fun I've had after building many kits. Just take your time and identify all parts carefully before placing and you should be fine.I was really happy that I was able to get this through Amazon! My nephew is an avid LEGO builder! Value for money...LEGO can be expensive.Grandson loved itNo trae los rines completos....no hemos podido terminar de armarlaIt was a gift for my dad. He loved it! He got it all put together in less than two days.Like every single brick of it ???It was like a dream came true, I guess it is my entry to Lego World.My son loves it, I gotta admit I think it is pretty cool myself.The authenticity of the model is superb and it very much resembles the real thing.Purchased by 12 year old grandson using (some of his) own saved money. A lover of Lego he really enjoyed making this motorcycle, even working by torch light without his mother’s knowledge, into the early hours. Loves finished model and looking forward th Christmas for his next challengeI am really enjoying building this, but it is going together too fast and my monthly Lego budget has gone ! Why bother with moving pistons when you cant see them. Needed furniture polish to ensure moving parts move smoothly?It looks fabulousI love this model, and have it on display in my home office. Most of the build is interesting - notably, it avoids the use of the simple Yellow pistons in grey cylinders that Lego use for most engines. In this model they are constructed very differently and I am very pleased with the final result.This is an excellent product, very good quality, very well made peace's that fit together easily and firmly.The instruction are pictoral and easy to follow.