Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A great TV

I've had this TV for almost 10 years now, am being tempted by the new technology out today, but unsure if it would be much better than this set.When properly setup and maintained, this set produces jaw-dropping images, smooth motion, and unusually full-range sound (which you absolutely cannot find in today's TVs). An early-adopter's HDTV, it is a 4:3 rear projection set with 3 CRT guns: red, green, blue. Therefore, images from HD sources will be letterboxed, and equivalent to about a 49 inch widescreen set.It is important to set this TV up properly, and on of the DVDs designed for this purpose can help (for example, Video Essentials). For maintenance, a periodic service-menu gun-convergence is necessary, as well as taking the back botton of the set of to clean the dust off the 3 guns once or twice a year, and also take the back top of every few years to clean the big mirror.At some point, I will move on (mostly for size), but until then, I am still enjoying this set.