I used to have a HR-24 and that was sluggish to the point where I was literally 5 minutes away from taking a SledgeHammer! to it. Part of my negotiation with DTV at that time was for them to comp me the free upgrade to the HR54 since I never used a free upgrade before. Have no complaints about the HR54 performance wise. Wasn't going to go through the hassle of putting an SSD in the 24 since I just had that one box.