What is the practical difference between electric and pneumatic sit-stand desk mechanisms?

Electric vs. pneumatic mechanism specification at OfficeFurniture2go.com: electric for full sit-to-stand height range (22–24 inch travel), memory presets, and commercial-duty applications. Pneumatic for counter-height workstations, laboratory benches, and environments where motor-driven mechanisms are undesirable. Electric is 95%+ of commercial sit-stand specifications — the height range, memory presets, and ease of use are substantially superior for office applications. Pneumatic desks are a specialty product for specific application niches. Call 1-800-460-0858.