Like certain investments
Else clues• Can't-miss
• Fail-safe
• Having a money-back guarantee
• Like a money-back guarantee
• Like certain investments
• Like some investments
• Like some trials
• Perfectly safe, as an investment
• Retailer's guarantee
• Safe, as an investment
• Surefire
• Surefire, as an investment
• Without a downside
• Can't-miss
• Fail-safe
• Having a money-back guarantee
• Like a money-back guarantee
• Like some investments
• Like some trials
• Perfectly safe, as an investment
• Retailer's guarantee
• Safe, as an investment
• Surefire
• Surefire, as an investment
• Without a downside