I now have three red lime trees, two are rather small at less than two feet each, one is still in a pot, over five feet tall and producing many fruit.
Some are dropping prematurely, currently they have a bit more than a hint of yellow / orange color skin and the inside is pale / light orange colored. I expect the worst and accept the best when it comes to fruit I have not tried before and I was surprised that such juvenile undeveloped fruits had such a nicely distinctive flavor.
Definitely more on the (less than sweet) orange flavored side with a hint of limey bitterness. The more green than orange skin was inedible... so far. Overall if the flavor develops as I hope it will I see a great many uses for these fruits in the future. I plan on giving one of my little trees to a friend who is just starting to plant out a nice large lot.