T.F.
I do not know anything about Mr. Coffee
As for Keurig, we were going to get a simple one because we just drink coffee in the morning. However, after talking to a few people, we decided to get a better one that has a bigger water reservoir.
We are very pleased with our purchase. We got the Keurig Platinum and love it. It is super simple to use. I would recommend to anyone to step it up a couple of notches and get something better instead of going cheaper.
We got ours at Costco for $149.99 and it came with 60 K cups. I've seen it no lower than $179.99 at Kohl's, Target and Penney's and their versions only come with an extra 12 K-cups.
My local grocer has good deals on K-cups and I keep a variety on hand. I think the most I paid for a package of 12 K-cups was about $9 not on sale. We prefer the Starbucks Breakfast blend and medium blend coffee and enjoy tasting the others every now and then.
I think your SIL would like the Platinum Keurig. You do not have to constantly refill the water reservoir and when it gets low, the light blinks to remind you. It is not that fancy other than you can choose what cup size you want to drink.
No matter which brand he goes with... make sure to always use filtered water.
ETA: Kudos to you Christy Lee... You did get a good deal!!