Watch out for contract length penalties. Some companies lock you in for 12 or 24 months, and breaking the lease costs a fee. That fee is usually around $100–$200—enough to ruin your “I saved money” mood.
Also, check if the rental company covers damage from power outages or freezing. Because mother nature doesn’t care about your softener’s feelings.
And if they charge a return shipping fee when you move? Run. That’s like paying someone to take back a sock you borrowed—just no.