Stay with Kukui if
Stay with Kukui if the platform is wired into your shop-management system. When the site, the customer database, the reminders and the point of sale all talk to each other, the integration is the product. Pulling the website out of that loop can cost you the follow-up marketing that pays for the whole thing.
Stay if you are in a NAPA or distributor program that subsidises or steers the relationship. Program pricing and co-op arrangements are real, and a lower sticker price elsewhere may not actually be lower once those are counted.