Looking at coffee makers for a Mother's Day gift, it's all she drinks. She never had a single serve coffee maker like a Keurig and I don't drink coffee so I don't know what I'm buying. What do you recommend? I saw a Mr. Coffee single serve for $80 compared to the the $100+ Keurigs, people said it's pretty similar? Also, she loves her Folgers coffee, can she use that too or do these machines just allow the cups?