I don't get the "Hawaiian" RL shirt. I would strongly recommend you do something better with your money. It doesn't look stylish nor tasteful in any way and it doesn't communicate anything I would want to associate myself with. I don't mean to sound disrespectful; it is just that there is no occasion I can think of where this would be the perfect garment. Furthermore the lack of versatility should discourage anyone.
Actually, I think I'm being too polite here... frankly that shirt is absolutely atrocious. I wouldn't wear that shirt unless you paid me a substantial amount of money or threatened me at gunpoint. The 'vibe' that shirt gives me is badly dressed tourist in Hawaii. Burning it would be a waste of lighter-fluid/matches.
I hope this helps.
Something tells me you wouldn't be the type to wear any floral shirt.
Surely there are a few floral shirts in the world that I could wear, this just isn't one of them. IMHO that shirt just fails at everything; it is either a way too loud casual shirt totally devoid of subtlety or a bland and boring attempt to create a fun and colorful Hawaiian shirt. The retiree vibe you mention is also present if that's what you want to communicate. Just my honest opinion since that's the purpose of the thread, buy ten if you want to, it'll make the rest of us look better by comparison.
I decided not to buy it because of the attributes of the shirt I mentioned. You can give your opinion without being a jerk.