Some of the teachers at Skyler's preschool said that they had trouble understanding Skyler's speaking (pretty ironic actually). So I took him to be checked out by a speech therapist. I figured if there is something that we need to work on we should do it before he starts kindergarten.
We went over and met Monique, who tested Skyler's speech. She asked him to look at pictures and then tell her what each one was (book, house, pencil, etc.), she asked him to make faces and make sounds ("Tah, dah, pah" and "Ooo, ooo, ooo") then she took out a little flashlight and asked him to open his mouth and make sounds like "Ah, ah, ah". When she finished Skyler asked her if he could see the flashlight and then asked her to open her mouth and go "Ah, ah, ah" she did, and as his diagnosis he said "I see your uvula moving up and down." Monique was very surprised and said "Wow, most kids your age don't know what a uvula is! You have quite a vocabulary for a 4 year old!"
She said that he does something called fronting and backing with some of his words (switching the sounds in a word ex: cat = tac) but he only does it sometimes, and with harder words, so she thinks he already self-correcting and growing out of it. It's why he pronounced his name "Styler" for so long and with a little work he'll stop it all together.
Side note: when I told Skyler that some of his teachers had a little trouble understanding what he said sometimes, he said "Sometimes I don't understand them, like when they speak Chinese to the other kids." (Most of the kids at his school are Chinese.)