I own a Senseo 7817 Original (the standard model for around 40 euros) and a Senseo Twist 7870/60.
The pads work with two machines, but:
In 7817 the pads are a bit annoying, because the pads go exactly to the top edge of the pad holder. Because after brewing always remains on the pad a little water, it may pass through it in 7817, that water open to the flap from Pad runs on the machine. Not bad, wipe out short, but annoying, it is on time already.
In the 7870/60 Twist, things look quite different. Here the pads fit very well in pad holder. After scalding simply open the door, let the person standing on the pad water leaked shortly. Interested coffee and a clean affair.
Conclusion: The pads are great, but you should check which pod holder has previously once (Should you have a Senseo Twist, you can access without reservation -> see picture).
* Update *
I done in self-test, the Ecopads times in the dishwasher (45 ° C) and apparently they are dishwasher safe.