Sorry. Not many Logic users here I guess. Space Designer is convolution based? I personally think your limitations, if any, are dependent on the quality of our impulse files. Honestly though, I'm not a huge fan of convolution reverb. I can never get it to sound just right. But then, that's probably due to the quality of the impulses I'm using which aren't particularly great. If I had the time I would want to go around getting my own samples for IR.

I use Logic and Space Designer is my "go to" reverb. I haven't tried Altiverb so I can't compare but I am really satisfied with what Space Designer can do. You need to get the right IR to go with your mix and if you search on the web there are many free IRs. Also you can make your own; for example you can rent a reverb unit and make IRs of your favorite presets and use them in Space Designer. It comes pretty close to the real thing.

I helped a friend make a CD of his classical guitar compositions and interpretations and I use Space Designer to simulate a church reverberation and we were thrilled with the results.

You can use the impulse response utility to record and deconvolve various clicks & sweeps, allows you to use convolution on all sorts of sources, not just room reverbs.

TBH it's more useful as a convolution processing tool than it is as a reverb. There's something artificial about artificial reverb.

I started out with using Space Designer. But then I tried the Lexicon reverbs and they stick a lot more to the track. It is also a more natural reverb. I believe the Space Designer takes a lot more time to make it sound good. Altiverb is awesome too.

Sometimes I find myself frustrated with Space Designer's default rooms/halls, and in 99% of these cases I realized I needed a plate kind of reverb or even an algorithmic reverb(PlatinumVerb is quite good). Otherwise there's a load of good IRs floating around, even some Bricasti M7s which are lovely.

bishopdante, post: 396506 wrote: You can use the impulse response utility to record and deconvolve various clicks & sweeps, allows you to use convolution on all sorts of sources, not just room reverbs.

TBH it's more useful as a convolution processing tool than it is as a reverb. There's something artificial about artificial reverb.

What I'm referring to here is doing stuff like loading in a short-decay 808 kick drum, and using that on a kick drum, for example, or taking a rifle-shot off a test range, and applying that to a snare drum or hand clap. Loading in various impulse functions for convolution is a tool which can achieve a variety of processing effects. I've even found people using space designer as a mic simulator, tape simulator, or speaker cabinet simulator.