I read about the Red Sea Leaks reported on the G1/G2 versions. After doing some research on the changes to the G3 versions: marine-quality plywood cabinets, extra cabinet frame bracing, eurobracing around the top, different leveling feet, a support lip added for the front glass, etc. I decided to purchase a Red See Reefer 625 G3 Max. Some of the changes I've listed only apply to their larger boxes, 425 and larger.
I also tried to find reliable statistics on leaks/failures by units sold for a number of major retailers without much luck. I did find it interesting that there were reports that WB had a habit of removing any negative reports, while Red Sea kept negative reports but turned off comments. Not that I'd trust any manufacturer to be completely upfront with their failure rates and warranty approvals.
One thing I found interesting is that, regardless of manufacturer, most leaks seem to occur at the 3-4-year mark or later.
Since I couldn't find any definitive data, I looked at the options, the changes Red Sea had made, and decided to go with one of the new G3 Red Sea tanks. The best data I could find were the relative
market shares, where Red Sea seems to dominate, and WB didn't even show up. But, since none of them actually publish sales, failures, or pretty much any data publicly, I was left with just making a judgment call.
Bottom line is you need to be comfortable with whatever choice you make. Now, if you want to wait 3 or 4 years, I'll report back on my experience
