Any one ever use one of these? They are cheap delay pedal but its only becuase you can get up to 400MS of delay. How long is that?

I want something that would give me that cool delay sound that alot of people use on solos. I just want more delay then a reverb pedal would give me. Its not like i want 5 seconds of delay time or anything.... would you even use 5 seconds of delay??