I bought this on recommendation from my physio, for building up wrist strength after surgery (been having physio for five months to get to this point) given that she uses them all the time and took a couple of attempts to start one with the string I thought the extra money for the autostart version was worth spending.
I've not been disappointed, it is very easy to start - if you have any sort of wrist problems the starter string is going to be tricky so I'd strongly recommend this version. You can use two hands to turn the inner ball if it's too hard to use just one hand (for starting). It also makes it really easy to get it going again after you fail to keep it spinning fast enough (which will happen often at the beginning, this is the whole point - it is meant to be difficult or it wouldn't give you any benefit).
After a few days of use - I can already feel the improvement in strength.....for those who say it isn't hard, try keeping it going at over 7,000 for more than five minutes and I can assure you that even people without any wrist injury will start to struggle, hold it out in front of you palm down (how physios teach its use) and you will feel the benefit in your forearm as well as the wrist.
As others have said the 'deluxe case' is actually a plastic shop display box so I'd recommend buying the case that Amazon sell to keep it clean and safe. A paper quick start guide for the different settings on the electronic display would make it perfect but it's still worth five stars as you can easily print them from the CD - which does include instructions for starting it - they are just on a different tab from the manual ones as the CD covers both versions.