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They mislead you a little on the jet count. The have two Master Blasters (which if plumbed properly are great by the way!) that have a 15 hole plate placed over the jet back. This is actually just ONE jet not 15. They use this jet to falsely increase their jet count. So if they have two Master Blasters they are actually increasing jet count by 28 jets. Many people use a variation of this jet (usually with 14 holes, Master gets it made with one extra just for them to use the name) but do not add it to their total jet count.
The reverse molded deep seat is questionable for anyone 5' 10" + or a tall torso. You tend to float up a little when in a hot tub and the mold digs into your shoulder if your tall or average height for a man. I would check this in wet test to verify what I have found.
The corner filter takes away from what would normally be a very comfortable seat. The corner seats tend to be the most comfortable. If you want 4 adults with 8 legs to fit nicely you might be a little tight. But many spas are designed like this.