Been on a bit of a spree and picked up the RV-500 a couple of weeks ago and so far I'm really impressed. I really love the Hall and Plate verbs and I think the Space Echo emulation is great and I own an original. I'm not going to say it's exactly like it, but much like the original it does a great job of blending with and enhancing your regular guitar sound in a way that digital delays don't. I love that all of the reverbs also have a basic delay that can be set to toggle on and off with the "C" foot switch. This allowed me to replace both my reverb pedal (TC Hall of Fame) and delay (TC Nova). Now, I'm not a power delay user and I can see why others would need a separate delay pedal, but the delay on the RV-500 covers my needs.
I also was impressed with the editing software. It really makes ordering and naming presets a breeze and for the most part is pretty simple to use. The only thing I've had some trouble with is consitently assigning the function of the "C" foot switch. Speaking of the foot switches you can assign different functionalities to the foot switches based on the way you want to use the pedal. I like the default setup where the "A" and "B" switches switch between two presets. In other words when you press on A that preset comes on and if you press it again you are in bypass, but if press B the preset immediately changes to B. You can also set it up so that both presets are on at the same time and can be assigned to either the left, or right output. I can definitely see having some fun doing this and going out to two amps.
I will say, I've never used any of the Strymon reverb pedals and I imagine they probably have some sounds that are better than the Boss, but I also think the Boss probably does some sounds better than the Strymons. I've also used and own an Eventide H3000 and have experience with some of the high end Lexicon units and honestly this thing is not worlds apart from those types of units. I also ran some synths through it and had no problems with the levels and thought it worked great in this application.
The only negatives I can think of with this pedal are the spring setting which just didn't sound good to me and that it doesn't come with a power supply which is almost a necessity with a pedal like this. I also am slightly leery of the build quality as it does feel solid, but one of the knobs popped off pretty easily when I was mounting it on my board. I was easily able to put it back on and Boss pedals are known for durability, but the pot shafts did seem to be a weak point.