I have a Short Timer, and it does exactly what I want it to. As long as you don't need fancy stuff like presets, modulation, looping, or long delay times, it's great. The biggest downside is its size - it takes up 2 Boss pedals' worth of room on my pedalboard.
To my ears, it's better than a Boss DDL. Rocktron has intentionally made it lo fi/vintage sounding, which makes the original straight signal cut through a bit better. Squeeky-clean DDLs tend to bury the dry signal in repeats if you're not careful.
You can't argue with the price - I got mine slightly used for $25 on eBay, and since the seller lived in my town, he delivered it for free.
The best part is, it's big and green and reminds me of my first delay an MXR Analog, in about 1979.
Go for it.