Instruct: Classify a review into positive or negative sentiment.
Query: Worst DVR I have ever used.

I normally don't write reviews for products, but this DVR is one of the worst pieces of junk I have ever owned. I got it unknowingly as part of upgrading my DirecTV service so that I could have another tuner.The response time is way too slow from the remote, the user interface is not intuitive, the Pay-Per-View menus are unecessarily clumsy, and it doesn't appear to continuously record TWO channels at the same time.In comparison the first DVR I received when we got the Tivo service is a Samsung SIR-S4040R and this unit is awesome. There is nothing fancy, but it is very intuitive to use and has more than adequate functionality. I especially like the Live TV button where you can instantaneously switch between the two satellite inputs that are continuously being recorded.When upgrading your service or getting a new DVR from DirecTV make sure you ask which unit you are getting and stay away from the R15-300 or anything like it.