I really like my Nespresso machine. Their machines are set up so you buy their pods from them after for 65-70 cents per shot. They have a wide selection of flavors and you can also buy some non-proprietary pods to fill yourself. I think the value in their machines is very good because they make the money from you after in selling the coffee. I think the quality of the shots you get and ease of use are great though. I'm not sure how things add up cost-wise in the end long term.
When I was researching I found a bunch of good info on this Youtube channel. They seem to give pretty honest reviews and liked the Nespresso shots produced in their review, but there's also reviews for a bunch of other machines.
Seattle Coffee Gear