If you are using any other Tivo remote, you owe it to yourself to get one of these. Tired of fumbling with your old Tivo remote's soft spongy buttons that don't seem to quite do the job even when you are super careful to press the buttons firmly? I thought so. (And if your remote's buttons haven't developed that spongy feeling yet, just wait. It will.) This remote beats the old ones hands down. When you press a button there is a tactile click to let you know that contact has been made. The remote feels great in the hand, although not substantially different from the older models except for a texture on the bottom of the remote that lets you know which end you've got ahold of. This is a great feature. The backlight is great too.
There are a couple of issues with this model however. First of all, they switched the position of the "Thumbs" and volume/channel buttons, which was a pretty dumb idea. Volume and Channel were much better positioned on the old remote, just above the pause & play buttons. They are still within reach on this newer model, but this seems like a pointless change. The intent was to make the thumbs up/down easier to get to, but honestly, once you've had a Tivo for a couple of months, how often do you really use the thumbs?
The other nit with this device is that it uses 4 AAA batteries instead of 2 AA's like the older model. Not such a big deal in and of itself, but battery life seems considerably shorter. Not that you'll be running out for batteries every month or anything. I'd say they last at least 6 months for a heavily used unit. (When the remote starts responding intermittently, change the batteries). But compared to the older remotes that could go years on a set of AA's, the new model is a step backward, albeit just a little one.
Despite its faults, this is still a great remote. It works perfectly with older TIVO models. I have not tested on the Series 1, but the Series 2 remote works with the Series 1 and these work fine with Series 2, so if you still have a Series 1, you're probably in good shape. This remote also works perfectly with the Humax and Toshiba DVD burner Tivo's.