I've had my 330.7 up and running for about 15 months now. I really have no complaints. It's my first large complete system so I don't have anything to compare too. I had a reefer 170 that failed and have a 300 running that I'm keeping an eye on. I'm done with redsea tanks.
My other larger systems were standard tanks with diy plumbing and diy sump. When I decided to upgrade my 180g to the 330.7 it was mainly because it had the foot print I wanted. I wanted a 7ft tank with 30" front to back depth and WB fit that requirement. I looked at cade but with the built in ATO reservoir on the back it wasted too much space so I passed. WB support was good when I had questions. I'm not a big fan of the check valve on the return line because I don't trust them but the sump can handle the full volume that drains when the return is off so if it fails its not an issue.
The stand is taller than I wanted but it isn't a complaint. The only way i could have gotten a shorter stand on a big tank wouid have been to go custom and I just wasn't up to the DIY plumbing so I compromised.
The large single piece 1/2" euro brace is really nice at keeping water from splashing over the sides when feeding or cleaning glass. It comes with ok mesh lids but I'm running open top. The tank is a beast at over 600lbs empty so plan on hiring someone to set it unless you have some strong friends. I opted for curb side delivery but I have a tractor with forks so I was able to unload it directly from the freight truck. I paid a moving company to set the tank.
I wish I would have plumbed a fleece roller in before I set the tank. I don't do well crawling around on the floor so I'm not up to plumbing one now. Its an old guy thing not a knock on the sump.
The sumps fits my needs fine. I run mesh socks that are easy to clean. The second chamber is set up in the large configuration and packed full of live rock and runs as a cryptic fuge. Skimmer and a floating Santa Monica surf 2X ATS are in the 3rd chamber. I run a jebao DCP 15000 return.
The stand is solid with the 80/20 frame. Negative - The slots on the 80/20 used for the stand are non standard and typical t slot bolts will not fit. I found this out when I went to mount my light bracket to the stand. I suppose I could have reached out to WB but I just pulled a few bolts from the stand to use then ground down the heads on some standard bolts I bought to replace them. Not a big deal but something to keep in mind if you plan on attaching anything to the stand.
Feel free to reach out if you have any particular questions and I'll do my best to answer them.
EDIT: There are a few other 330.7 build threads here on R2R that you may want to check out.