I love love LOVE this printhead. Was able to double my print speed and achieve way better quality. The build feels super solid with very clean machining. Clear and simple guide (though I will say the guide lists self tapping screw but my kit came with flat tipped. Still worked perfectly, just slightly confusing). Filament changes are pretty clean as well using a cold pull and doable with mid print filament retraction through PrusaSlicer's built in function. Solved my retraction and extrusion consistency issues as well. PETG prints so clean now for me (Dummy 13 in photo was printed with no supports and only cleanup I had to do was cutting the pieces off the runner card I used)

The extruder looks and perform amazingly.

By installing this Extruder/Hot End I saved over 150g of weight over my old Hot end with a Satsana duct with the old Micro Swiss linear rail mounting plate and stock extruder stepper motor..
I'm trying to push my E3 v2 a little faster. This is my 3rd Micro Swiss extruder mount over the . First was one to use with rollers and transition to direct drive. The second with linear bearings. This one was mostly for the weight savings and the extruder can push more filament at higher volumes. So far I have reached 300mm/sec with good results. I did however print a duct assembly that uses a 5015 blower fan instead of the stock 4010 blower unit for better part cooling and am using a solid copper heat block.
All of the Micro Swiss extruders are top notch.

I'm very satisfy of this device, all works fine, both for installation and for use. No surprise.

I do like the NG extruder and I get really great print quality from it, but I have a love-hate relationship with it. The build quality is great but it has one major flaw: the melt zone is significantly wider than the inlet throat which means that pretty much impossible to unclog if the nozzle gets blocked by impurities and I constantly get filament stuck if I'm not careful when pulling it out.
The only way to clear a nozzle blockage is total disassembly. I'm used to being able to perform a cold pull to clear nozzle blockages and that's impossible to do with this extruder/hot end combo. I've had to disassemble it multiple times due to filament getting stuck (bad luck, I know) but the juice stopped being worth the squeeze. I've given up and went with an H2 instead.
Such a pity because I really wanted to like this extruder.