I got a Tassimo for Christmas.
Not something I would have bought for myself and I’m suffering severe eco-guilt because every coffee from it results in plastic and foil waste. 😐
I’d say the coffee is good, but not amazing.
Better tasting than instant, less faff than a “proper” machine.
No idea how the Gusto works, but the Tassimo T-Discs™ all have a barcode on them that tells the machine how much water to put through, what temperature to heat it to etc. So the results are very consistent.
Pretty sure none of the discs/pods are interchangable between machines.
You can buy the Tassimo ones in ASDA, or order online for a bigger selection (including Twinings tea, hot chocolate, fair trade etc).