I have installed most the betas, think version 8 now, I'm not part of the Google beta, was hoping for Coolwalk, but I do like the simple layout.
My son uses Carplay, I call it the Early Learning version, a squashed map, more track information than is required.
Unless you have something bigger than an 8" display not sure Coolwalk will look good with anything screen smaller.
Plus with Carplay, Waze never works properly.
ZFold4 [Mobile], Pro5 [Watch], S8 Ultra [Tablet], Book2 Pro i5 5G [Laptop], Buds Pro2 [Buds] M70A 32/43" [Monitor], Smart Tags+, iPad Mini 5 and iPad Pro 12.9 GEN2 [Tablets], Dell Inspiron G5 Laptop
ZFlip3 and ZFlip4 [Mobile], Watch5 40mm and 46mm [Watch], S7+ and S6 Lite [Tablet], QN95A [TV], Q900A [Soundbar], MC28M6075 and MC32K7055 [Microwave], Jet 75 Complete (Vaccum), Samsung Level [Speaker], Buds Pro [Buds], iPhone 12, iPad Air 2, Air tags