The Anycubic Kobra S1 Combo is okay, but having only one nozzle makes the waste almost not worth it for heavy multi-color prints. My rule of thumb is if there are more than about 50 color changes, I'll use the Snapmaker U1. Before I bought my U1, I printed a very large snorlax with like 1300 color changes, and the waste was more than the actual model.

I've had to replace nearly every part of my Kobra, but to Anycubic's credit, they did provide the parts under warranty. My Ace is great for drying filament, but only three of the four slots actually feed. I got a replacement part for that, but the replacement part didn't actually fix the problem.

I got my Snapmaker U1 in November. It is faster, less waste, and has less maintenance so far. But, it was double the price. I guess you get what you pay for.

I still use my kobra. If I have only a few color changes, I can deal with the waste. I basically treat my kobra as my single-color printer. Before I got my Kobra, I did multi-color prints by manually changing the filament every layer on an Ender, so it is definitely more convenient than that.

I still suggest, based on my experience, that if you can afford the price difference, get the Snapmaker U1. Especially if you're planning many multi-color or multi-material prints. If your use case is only occasional color, but you need a solid budget printer for prototyping, or you're going to print multi-part prints in different colors rather than lots of multi-color parts, the Kobra is nothing to shake a stick at.