This is very cool and now "Vintage" Reverb by Alesis that works very well for a home recording studio.
This unit has never been used on the road or used out of a studio setting.

Review Brief: (from "Sound On Sound")

If you're the kind of user who wants access to quality 'bread‑and‑butter' effects but without having to devote large amounts of time to programming, then you probably needn't look further than the Midiverb 4. It doesn't have the fire‑power to create some of the more dramatic Quadraverb‑type effects, notably because of the lack of serious EQ, but what it does do, it does exceedingly well.

The operating system is a real joy to use and all the effects have a great sense of warmth and space. Patch switching is very fast (though on the review unit I felt the changeover could have been a little smoother), and I was particularly pleased at the low level of background noise on all the patches, flanging included. The automatic level setting feature is a very welcome addition for those who still believe that gain structure is just something that happens to other people, and the large, clearly marked buttons and generous display make the whole interface more welcoming than on many competing units. Admittedly, the Midiverb 4 may not break any new ground in the effects department, but it does provide exactly the right blend of features, quality and cost to win it a lot of friends. I already have a fairly full processor rack, but I could easily justify adding one of these.  

  The Configurations fall into four basic types:

• Single
• Double
• Dual Mono
• Multi Chain

• Concert Hall
• Real Room
• Ambience
• Plate Reverb
• Reverse Reverb
• Mono Delay
• Stereo Delay
• Ping Pong Delay
• Multi Tap Delay
• BPM Mono Delay
• Delay:Delay
• Mono Chorus
• Stereo Chorus
• Quad Chorus
• Chorus:Chorus
• Stereo Flange
• Flange:Flange
• Lezlie>Room
• Stereo pitch Shift
• Pitch:Pitch
• Auto Pan
• Delay>Real Room
• Chorus>Real Room
• Flange>Real Room
• Real Room>Flange
• Chorus>Delay>Room
• Flange>Delay>Room
• Real Room + Delay
• Real Room+Chorus
• Real Room+Flange
• Chorus:Delay
• Flange:Delay
• Summary

• A competent, friendly all‑rounder that is best suited to producing a limited number of simultaneous effects to a high standard. Should appeal both to the home studio operator and to the more professional user looking for a second or general‑purpose device.