As far as I can tell this contains 2 of each of the main Nespresso range (not the flavoured coffee), so if you want to have a try of the range to be able to pick you favourites then this is a good way of starting off.
There is a good range of origins, strengths and decaffs to try. The foil lid has the name of the coffee on it, so you can pick them out on the Nespresso site later. I never had a capsule fail in my machine and all extracted coffee from the capsule as expected.
Value for money isn't so good. When I bought mine they were priced at almost 15 GBP which worked out at almost 50p per capsule. They are considerably cheaper on the Nespresso site, but you do have to add 4.95GBP p+p if under 50GBP and order in multiples of 50 (mixed or same) capsules. So this sampler set isn't a bad way of trying out the range albeit a bit costly.