I had an Oceanic Biocube before Coralife bought and rebranded them.
I think they're decent all-in-ones that are available literally everywhere with a few drawbacks you should be aware of:
1. The rounded glass corners are a PITA to clean.
2. Back chamber is tight and due it being so tall, is hard to maintain but you should keep up with detritus buildup.
3. Typically the stock lighting is on the lower end side, most swap it out for a AI Prime, Hydra 32, or XR15.
4. Their add-ons are basically worthless, don't buy their filter media, skimmer, UV, or pumps lots of better options out there like inTank and Tunze to name some.