TL/DR: Great location, the condo is solid but spartan, TIR not great.
The location at the north end of Tybee is quiet and access to the beach is an A+. We loved being up on the third floor because it gave us a bit of a view out over the pool and you could see the beach and the ocean through a gap in the buildings. Morning coffee on the balcony was delightful. That said, I think the unit can best be described as "spartan". For instance: no coasters meant that the coffee table and end tables were all water damaged. A few throw pillows on the sofa would have added some comfort (it is a very soft sofa) and some ambiance. When renting a condo it's generally because you want to have some meals in-house. So only three wine glasses in a place that sleeps six, is odd or so we thought. No ice cream scoop for a beach property? Weird, especially if you have kids. It was really, really sparse in the kitchen. Only one garbage bag (as someone else pointed out) and zero things like salt and pepper etc. We stayed at a condo in Hilton Head in March and its kitchen had staples like oil, vinegar, salt and pepper, and spices and there were beach chairs and umbrellas, and so on, so it really boggled the mind that there was so little here. It struck me that the property was perhaps owned by TIR and not just managed by them on behalf of an individual owner. Honestly, $100 at Dollar General and it could have felt warmer and the kitchen would have been more complete. The bedrooms were more nicely appointed than the living area. The suite was clean with the exception of the washer and dryer which had not been wiped down (lots of sand) and the dryer lint trap hadn't been emptied in ages and was a full-on fire hazard. The smoke detector was beeping intermittently the first night and wouldn't cease even with the battery removed. This meant a night on the couch with the bedroom door shut and we bought a battery in the morning and fixed it. When we asked the property managers what to do if it started up again in the night, they allowed that even though there was an emergency number, there was in fact no one on the island overnight to help out. The dishwasher did not work for the duration of our stay (the door would not shut properly) and while TIR sent someone to fix it (it seemed fixed), as soon as we put dishes in again the door would not latch.
These annoyances started to add up after a few days and soured an otherwise terrific stay.