The R series really are amazing for the price and the Aquarius is no exception. A ton of different delay options which all sound great, including a few unique to the Aquarius (like the Galaxy option, which is sort of a spacey reverb), and a built-in looper to built. Looks great, easy to use and understand, and does everything you'd want out of a delay pedal, plus it's also got tap tempo AND a super long delay time (about 3 and a half seconds) to cover the whole spectrum.
The only drawbacks are the general build and feel of the pedal. You can tell it's been made cheaply. The switch on the bottom to toggle the LEDs is placed really badly and is very difficult to switch (I had to use a pen lid). The other thing is the knobs, which do feel a little cheap and plastic-y (although they're not nearly as bad as I've seen some people say, they still have a lot of grip to them).
All in all, a really impressive pedal for such a good price. If you're after a first delay pedal to work out what you like, this is the best.