I had two very different experiences with Aeroflot.
In spring of 2001 I flew Moscow - Murmansk in an old Tupolev. During the flight I noticed that the outer window started to freeze, then the connecting screws started to freeze and finally a nice block of ice formed on the inside of the interior window. While I was thinking whether it would be safe to use that ice for the vodka tonic the flight attendent was serving the issue resolved itself because we started to slide down the Murmansk runway sidewise
In summer of 2005 I tried Aeroflot once again on the Munich - Moscow - Hong Kong route and the Shanghai - Moscow - Munich route. This time it was a great experience in top-notch Boeings with excellent service ^
For international flights Aeroflot is great but I would think twice about domestic flights. Especially since there is an excellent night-train service between Moscow and St. Petersburg.