Rotary or guillotine paper trimmer — which should I buy?

Across the reviewers we read, rotary trimmers (like the Fiskars and CARL models) are favored for precise, safe, repeatable straight cuts on photos, cardstock, and craft paper, while guillotine cutters (Swingline, Westcott) are preferred for cutting larger stacks quickly. If safety around kids and fine craft accuracy matter most, buyers lean rotary; if speed through thicker stacks matters, they lean guillotine.