Keurig K-Mini Plus is better than the Keurig K-Mini. Worth the extra price for that Bold feature I use all the time that the K-Mini does not have. Makes a stronger cup of coffee with more flavor.
Keurig last a long time. The key is to use filtered water or pure purified water at all times. Avoid spring water or water with high mineral content like Fiji Water. It reduces the amount of time you have to descale your Keurig machine, and prevents product from being destroyed overtime and unusable. The older Keurig machines are more friendly with hard water compared to the new Keurig machines.