For about 5 years, I used to use just two of these with a cd player and a turntable for live sets.
Now, they're still a major part of my drum machine rig. Two of them in serial make up one of my looping chains.
They're limited to 4 seconds max, the fidelity isn't all the great, and
you can't choose the start and end points. (That depends on where you
have the time dial set.) But they do let you bend pitch and time
together, as if it's a tape loop. Two of them together make a great way
to quickly build ambient beds.
That's currently a good price. Last time I bought one on ebay, it was about $175.