We've been overall pretty happy with our Impact. Also, our old bumper pull toyhauler was a Raptor, but was rebranded the year after as a Carbon with no changes. We were overall happy with that too. I agree that you only hear the bad stuff online because by nature, people like to complain, but aren't really into making positive comments.
That being said, each have had some issues, but nothing unfixable or major. In our Impact, the front AC crapped out when it was only 4 months old, while on a week long boondocking trip in July. There were also some QC issues, such as the labels on the tanks being reversed, the outlet for the stove exhaust fan wasn't sealed so some water came in during a torrential downpour, the screws holding in the ceiling speaker weren't long enough and came out while traveling and then the speaker fell into the top of the slide, and some carpet staples were sticking out in the bedroom. But this was all really minor stuff that we either fixed ourselves or had the dealer fix under warranty. It's just a frustrating first year with any new camper, but at least this time we knew what to expect.
With a used unit, you don't know if the former owner caught all the QC stuff and had it fixed, and you also don't know how they maintained it, or how often they used it. I know whoever bought our used Raptor got a really great camper as we take really good care of our stuff, got every little thing we found fixed quickly, and we "gently used" it. I think we only had our RZR in the garage one time, and that was to bring the RZR home from the dealer when we bought it.
But, there's also people out there that really USE and abuse their stuff, especially toyhaulers. If you do go the used route I would hire an independent RV maintenance person to look it over. It's easy to clean it up and make it look nice on the surface but bad maintenance and heavy use can really do a number on the "guts" of a unit.
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