By itself, this inlay is perhaps underwhelming, but certainly not below average. For me, this is a prime example of keeping an inlay purposefully simple and allowing the base colour and edge spots of each denomination to shine as a result. The Aurora Star inlays are another example of where this works really well imo. It relies on having really good/interesting chip design of course, but in the case of the Aria line-up, I think they have accomplished this.
Paris and Flamingo do it just about perfectly IMO. An interesting design element, the name, and a clear easy to read denomination.
I think the “appeal” for Bellagio and Aria designs is because the casinos are among the best in Vegas and there card rooms are as well. If SLS had the same design most people would have said they are shit.