Sound — 7
After using this pedal in several projects I can definitely say that it is fully capable of being the sole modulation source for many guitarist. Here's a short breakdown of each effect: Vintage Chorus Reminiscent of an analog chorus with darker sounding modulation and an overall subtle effect. Modern Chorus - This setting is great for getting the Nirvana heavy chorus sound. Crank this one up and it's warble city! Phaser- Possibly the best feature of the RG-1. I liked it at slower settings for a Pink Floyd (MXR Phase 90) kind of sound. Flanger- A very acceptable flanger sound. It definitely has a classic vibe, but can get a little shrill sounding on the top end under heavier gain. Step Phaser- This is a nice bonus for this pedal for arppegiator-like effects. Vibe- For that classic uni-vibe/leslie-esque tone that sounds pretty darn good. Sounds cool ran into a fuzz pedal. Overall the pedal definitely has a classic vibe and again is widely usable and versatile.
Overall Impression — 7
All in all the Marshall RG-1 is a pretty darn good pedal. It's not the most amazing modulation pedal you've ever heard, but all things considered (price, features, usability, etc.) it's actually really cool. I could even see using it just for the phaser and modern chorus modes. If you are a guitarist Who wants to have a bunch of quality modulation effects at a reasonable cost, I would definitely check one of these out!
Reliability & Durability — 7
These Marshall pedals seem to be pretty solid. I suspect you could possibly have trouble with the jacks loosening after lots of heavy use. Although under normal care I wouldn't foresee any problems.
Ease of Use — 8
The RG-1 is a fairly straightforward pedal that shouldn't give any old school players problems. Each effect has a speed, depth, and regeneration control. Each effect renders a natural and musical modulation when the knobs are dialed close to the 50%. The depth and speed controls are audible during Live situations when quick tweaking is in order, and the regeneration knob will certainly add a more pronounced effect when turned up. Setting the knobs to more extreme settings can render very drastic modulation effects for creative weirdness. Although I had little trouble getting very nice classic phaser sounds (I.e. Shine On You Crazy Diamond by Pink Floyd) or flanger (Barracuda by Heart), I did have an issue with the markers on the knobs. The pewter colored pedal with pencil thin black lines as markers is definitely hard to see under stage lights. After getting used to the pedal this became only a minor frustration.