Quite a few! All the Suntu PETG seem to print identically and consistently well.
I am a sucker for the Grey (almost same colour as the P1P surround) and Orange.
Pictures of showing Sunlu PETG Orange.
Find no need for supports on anything below 40degrees, but as test print shows, you can achieve even greater overhangs if you dont mind an imperfect underside. Print settings are as those stored in the ARC enclosure 3MF for PETG
Printing with the Sunlu PETG so consistent I have switched to thats as my standard filament.
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Very cool. I will take this under consideration. Much appreciated. Is that petg orange darker than carrot orange? It appears so on the arc fittings but not so much with the test prints. I am looking for a darker orange petg.
The test prints are more reflective of the “orange”. The hinges have darkened considerably due to the camera exposure of being closer.
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I seem to get good results with a fresh roll of sunlu PETG. However, I have some rolls of sunlu PETG that are a couple years old and were never opened, and printing with those is a disaster. Even though they were vacuum sealed in plastic with a tiny desicant sachet included inside, I think maybe environmental moisture nonetheless must have gotten into them. If they had been packed in mylar bags, maybe this wouldn’t have been a problem. I’ll try drying them out and hopefully they’ll come back to life. It’s either that, or perhaps PETG filament somehow degrades with time.
I did try white Overture PETG, delivered fresh from amazon and even sealed in a mylar bag, but it was a disaster on the X1C. I tried running it at a number of different temperatures. It does seem to perform relatively better at higher temperatures, but in absolute terms it still did not perform well. Afterward I tried running a fresh roll of Sunlu transparent PETG, and the fresh Sunlu PETG seems to work just fine. Go figure.
Obvioiusly, not all PETG filaments work equally well in the X1C, so I’m glad threads like this exist for us to pool our experiences on what works well and what doesn’t. 
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I got very good results with Sunlu PETG too, but also with PETG from Extrudr and also from a cheap local vendor (12€/1kg).
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I suppose maybe the real question is which brands of PETG work best when the X1C is configured to the generic PETG settings? I mean perhaps brand XYZ doesn’t work well at the generic settings but does work well at some other settings, but who among us wants to FAFO with all that tweaking? Much better to load and go.
BREAKING NEWS!
I see that Bambulab now does finally sell its own house brand of PETG, so maybe this is all now relatively moot.