I have what used to be known as the 'Rev C' MBA - which I bought in September 2010 when returning from a posting abroad after two years. Indeed, the Rev C was seen as a considerable improvement (much more reliable) than its predecessors.
In any case, I had planned to get a MBA ever since they first came out, (at that time I had a MBP) but my employers supplied laptops and I didn't need my own one while working abroad. Besides, the work environment was Windows only.
Shortly after that, I also bought Applecare for it.
It is a beautiful computer, one which I have used since daily as my main computer. It has travelled a lot with me and is utterly reliable. Thus far, the magsafe adaptor needed replacing (which Applecare took care of), as did the keyboard, when some of the keys got stuck (again, Applecare did the needful).
Having had the benefit of the blazing fast SSD drive, (and the wonderful portability) I do not wish ever to return to a HDD drive on a computer (not when I am purchasing one for myself). Actually, my MBP suffered a HDD failure (also replaced under Applecare). Indeed, until the larger SSD drives come down in price, I have no intention of switching to a retina MBP as a main, 'desk' style computer, - despite the very attractive screen - and migrating to an 11" MBA for travel, which is probably my ideal spec a few years down the line.
Later this year, before Applecare runs out I will probably sell this MBA on and replace it with a more recent model; at present, my only debate is whether I decide to select a maxed out model (8GB and 512SSD), or satisfy myself with a the model with 4GB Ram and 256SSD.
However, to answer the OP's question: yes, my 2010 MBA is still going strong, it is an excellent computer, one which I have used a lot and must say it is by far the best computer I have ever owned.