I use FL Studio, and its Fruity Reeverb and Fruity Reeverb 2 are pretty limited. I've used AAR for a few months now, and along with the Uhbik package (Uhbik-A, in my personal opinion, is the only one that comes close to AAR), I never find myself missing the perfect reverb sound to use in any of my songs. In regards to AAR, I either find what I need in the unbelievably realistic presets, modify some to taste, or make my own from scratch in the midst of writing a song. Breakdown:
I like it. There isn't anything I would change about it, and I dabble in graphics design myself.
The quality of sound from AAR is incredibly detailed, and makes me wish I have better headphones than my current Shure SRH240A ones so that I can get the full effect. I've used AAR with many different virtual instruments, ranging from high quality sample libraries like Neo-Soul Keys and Strawberry Evolution Electric Guitar, to VSTi's like Zebra and TruePianos, to even free soundfonts! AAR can make even a free soundfont sound good (the soundfont itself just has to not sound absolutely terrible. ;D). Also, regardless of whether or not you make a good or bad preset, the quality itself sounds fantastic. It's extremely difficult to go wrong with this quality.
This is unbelievably customizable. There's wet/dry (of course), decay, attack, predelay, density, diffusion, room size, room type (small, large, dense, slapback, strong, etc.), modulation, high/low cut customizable knobs with visual representation for damping, and more! What I like most, aside from the time graph, the high/low cut and damping frequency visual, and the freedom for room type, is that you can double click the knob/slider to enter in a manual value for the knob/slider! It's incredible how many reverb plugins don't do that.
The interface is extremely user-friendly. First is the time graph and frequency representations in the GUI. It lets you know exactly what it is you are modifying. The possibilities of reverb effects are (subjectively) endless. If you can't find what you need in the 200+ presets, you can always make your own. It only took me about 2 or 3 days to figure out what every knob and slider did, and I have never extensively made my own reverb presets before I purchased this product. It's literally the first reverb I think of when starting any song.
I don't particularly remember what the file size was (it's quite small), but I can recall the RAM consumption was minimal. If I had to estimate, I would say loading 5 instances on FL Studio wouldn't add more or too much more than 100 MB to the physical memory. Definitely good for about 99% of customers' music-making computers.
VALUE FOR PRICE:
I don't regret buying this product for a moment. AAR is, by far, the best reverb plugin I've ever used. It's completely worth the $189 or 189 euros, if not more. You'll get the immediate satisfaction as soon as you give it a valid test (i.e. piano with a reverb preset meant for piano, rather than, say, guitar with a reverb preset meant for synth pads).
I highly recommend it for anyone who's looking for professional-sounding reverb. IMHO, this cannot be beat.