Well, it's been 8 years since my last renewal. I've only had to do the eye exam, so the process is pretty minimal/
This year, I put it off due to the moving target of needing the Gold Star (Real-ID) symbol added for travel. You're allowed to renew as early as 6 months prior to expiration and still have the next expiration date be your birthday in 8 years. The Governor's current COVID Emergency Order extended driver's license expiration dates until Nov 30, 2021. Mine expires on my birthday: 12/03/2021. So, I figured I might as well stick to my normal renewal date.
Anyway, I went online to make an appointment. They no longer allow walk-ins or stand-by customers -- appointment only. When I went through the online forms, the earliest was Jan 3, 2022. After browsing a little more, the site said they add the extended hour and cancelled appointments into the system between 3:30pm and 4:30pm the day prior. That applies to three locations: Kapalama, Kapolei, Koolau driver licensing centers. So, I waited to check after 3:30. At 4:00, there were no new appointments. I thought, maybe that's because it's Thanksgiving Day? Then when I checked again about 4:30, there were a dozen or more slots available at Kapolei for the next day. Woo hoo!

I picked the 3:45 slot. 7am just wasn't doing it for me!
Got there at 3:20 and checked in. They ask that you check in 15 minutes prior to your appointment, so I was good. At 3:30, they moved me from outside to inside the building. There I waited until just before 3:45 to be called to a window. They take you in order of your scheduled time, not according to when you check in.
I had all my papers:
- the license renewal application I filled out online and printed,
- my current license,
- my DD214 to have my license identify me as a Veteran, and
- my truck registration, for the Real-ID address verification
I didn't need my Social Security Card or Birth Certificate, since they had those already in their system. If your current license doesn't have your current address (like an out of state license), you need a second document for the Real-ID verification. The online app walks you through all the options for documents to bring.
I paid with a credit card. They add 2.35% for credit card transactions, so the total was $40.95 ($40 for the renewed license that's good for another 8 years).
Got my photo taken at another window, received my temporary license, and was out the door at 4:00.
Be aware the temp license is not valid for flying, so plan accordingly. Even if you aren't traveling, they recommend having a second form of ID on you just in case: military ID, passport, etc.
It takes 6-8 weeks to receive your license in the mail. If I recall, it was less than 2 weeks last time. I'll update this when I get it.
Kapolei has about 12 windows to process license and ID customers, so the wait is minimal. The appointment system is pretty easy to use and helps.
All in all, 30-40 minutes from arrival to departure was better than I normally expect to spend at the DMV or licensing offices. The workers were also friendlier than many I've dealt with before. Maybe they are still happy from their day off yesterday?

Hope this helps someone. Or maybe it'll invite others to share their experiences, too.
