I have never really used reverb on bass before. I have played with the TC Infinite as a practicing tool and thats where I first tried it. So I think reverb can sound great but it has its place and like you said above it has to be subtle, less is more type of thing. I think it sounds great and I am planning to use it with fretless and one of the bands I play in is a country band and in the more slow and more accustinc songs I was hoping to add subtle reverb.
As in the sound I dont have much to compare to (I have Wampler Ethereal for guitar mostly but I did try it on bass just to see if I would want to explore it further) and I think its great. I like it that I can mix the signals and then the size of the reverb. I do find the bass and treble subtle but I need to explore it more. But it really does add that something in quieter songs. Now the extra features, I really like the 'Size' and I can see myself exploring that. Build up sound scapes etc. The one I can see myself using is having the 'Exp' knob at 12 o'clock which allows you to play a note and it slowly trails off as you build up other sounds as you add if that makes sense. Fully clockwise its infinite which can sound really interesting such as ending songs etc.
I am still trying to figure 'In Lvl' out and I have emailed Taylor about it. I thought it was like the TC Infinite, you could play a note/chord and that would sound infinite and you could then play over it but its not the case or at least I am not able to recreate it.
But for the sound and the 'Size' function its a keeper for me.