No problem (Mac Pro, Digital Performer). Consumes very little CPU resources.
I use it for several years.
In fact, this delay is very basic. As I have other more advanced and offer more possibilities, I should not use it often.
But it has a feature that is very convenient, especially for dub: The two filters (LPF and HPF) are included in the feedback. This allows for a very natural and unpretentious repetitions rising gently towards the treble or bass to descend. All plugs delay or echo that I have is that which produces this particular effect as the prettiest.
 I just saw that this plugin is no longer supported by TAL .. Damage.