The Malekko Ekko 616's depth knob is noted for going from off to over-the-top quickly, offering a narrow usable range for subtle modulation.

The Malekko Ekko 616 includes a triangle-wave LFO and modulation depth attenuator, enabling fine control of modulation effects.

An LPF in the delay line, as seen in the Dark variation of the Malekko Ekko, is highlighted for adding unique tonal qualities, especially in unpredictable and noisy results.

Owners of the Ibanez Echo Shifter report reliability concerns, potentially due to faulty solder joints, despite positive performance and versatility with mod and osc settings.

The Behringer Vintage Delay's dual outputs allow unique routing for dry and wet signals, facilitating creative effects processing like stereo chorus on echoes.

The Strymon El Capistan is frequently recommended for high-quality tape delay emulation, though it's noted to be significantly more expensive than analog options.