Heavy Duty Excavator is LEGO set 42121-1. It has a score of 80. This is average compared to all other sets. The set is recommended by 0 reviews, based on 2 scored reviews and 3 reviews total. It is ranked in the bottom 45.81% scored sets on Brick Insights. We know this set was released in 2021, and it is categorised in Technic.
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I think this is a great set for its target market. This isn't meant to compete with the $100+ sets like the motorized 8043 or massive Bucket Wheel Excavator. This is a set kids will get and love. I particularly appreciate that the instructions start with building the arm and even call out to test the functionality before moving on to bag 2. That's a great user experience right there.
It's a realistic and compact model that packs a good amount of functionality into its demure size. It works well and is likely to be fun to play with if you're the right age to do so. The arm looks a bit out of scale with the body to me, but it's not a deal-breaker. Unfortunately, the frosty windscreen mars what would otherwise be a pretty much perfect model.