For me it was simple:
1) 1,380 Watts of solar on an RV roof, US made SolarWorld, German Designed panels = $952.20
2) 1,380 Watts of solar on an RV roof, Chinese made Renogy panels = $1,587.00
So for me I essentially got a free MidNite Classic 150 and my 1,500 24v PSW inverter by going with the SolarWorld panels and, they are built like little tanks.
In addition, the warranty for Renogy looks fine until you see what you need to prove a claim, you have to send it to a third party facility for testing and the losing party has to pay all testing fees, meh, it's like a warranty for show and nothing more, in function it's worthless.
With all of that said, I wouldn't avoid their panels, I would just know they have a place and won't work for everybody. Same with Harbor Freight tools, I got a set of 3/4 drive sockets on my trip, $48!! That's insanely low if you ask me! I will only need them a handful of times in my life and I'm certain they will hold up better than any 1/2 drive SnapOn stuff I own. I see value in their "cheap" for some stuff, in others I see almost none.
The only thing I would add is the charge controllers, there is NO WAY I would use a Renogy CC, why, going cheap on the solar fine but the CC it's pointless if you ask me. At least for anything beyond maybe a well pump or something odd, I would always put a good CC behind the solar, it's money well spent.