It fits perfectly with the Rohnson R-98100 coffee machine and I believe with all the classic budget espresso machines. Perhaps even better than the portafilter that came with the machine. Easy to use. I take off one star because even though I used a capsule with strong coffee that I have already used in other Nespresso machines, the coffee comes out thinner but with a bit of crema. I think the lid that makes holes in the top of the capsule should exert more pressure, but it depends entirely on the water pressure and not all the holes open, resulting in a more incomplete extraction. Other than that, a very good accessory for its price, it gives one more option to the machine.

It fits almost all Rohnson coffee makers R-980-10,12,13,14 etc.
It does its job just fine.

It is just what you need for the times when you are too lazy to open a jar, to put coffee, etc... and having a pack of capsules saves you in case you forgot to bring coffee! My coffee maker is the R-98015 and it fits.