Great splitter for HD
I have had absolutely horrible luck with splitters. This is one of the best-made ones out there.

The typical 900MHz or 1GHz-rated ones must be simply fabricating their specs (and no, I'm not an RF engineer, I don't know why a splitter functions as a low-pass filter).

I plug in the cheapie 1GHz splitter, my VHF and UHF analog signals are fine. My HDTV (broadcast on the local cable up on CH106, 107, 108, around 700MHz) is gone. Missing. Totally.

I swap in this splitter into my newly-all-RG6-cable system, signal strength at 98%.

If your HDTV is a bit dicey, throw out all of your RG58 cables, replace any splitters with 2.5 or 2 GHz splitters, and test any signal amplifiers in the chain (my Motorola one passes HD fine, my other one claims the same bandwidth as the Motorola - kills HD dead).

And if you're getting your HD from cable, you can always call them to come fix any HD woes, it's probably cheaper than some good RG6 cables and a splitter or two.

Works on Cablevision IO
I used this to split the TV side of my Cablevision IO service. I have this working with 2 HD sets and 1 analog set.

Works great!
Two of the cheapo splitters from my cable provider suddenly stopped working, so I decided it was time to get something a little better. The splitter by Acoustic Research was comfortable for my wallet too, being much cheaper than the similar Monster cables.

The video appears to be much sharper with the AR splitter, especially on the high definition channels. Or perhaps it's the placebo affect. But it fixed the problem, and now I have a strong signal going to both my TV and modem.

It's worth it to splurge a little on this handy device.

AR cable splitter
The product arrived on time and was a full retail package. Installation was easy. I had a cable company tech out because of some other issues and he tested the signal strength on the input and output lines. The signal levels were correct. The product works as advertised.

Does its job well
This splitter works exceptionally well. If you have a problem with the one you purchased, you probably either aren't terminating all of the outputs properly or you got a defective one.

Highly recommended!