Lavazza Maestro Ristretto (aluminum) is as good or better than most of the official Nespresso capsules. Highly recommend. They can be brewed as Ristretto, espresso, and Lungo. I rate them 9.5/10 :
Espresso Maestro Ristretto - Capsules Lavazza compatible with Nespresso* Original machines | Lavazza
Lavazza Espresso Ristretto Coffee Compatible Capsules – Italy Best Coffee