When deciding which Tattva Spa membership to buy, consider your preferences and budget. The Peace Membership offers 8 months of discounted services with a 25% discount, providing a good balance between affordability and duration. The Serenity Membership extends the benefits for 12 months, with a higher discount of 33.33%, ideal for those seeking a longer-term commitment to spa indulgence. For maximum value, the Tranquility Membership offers an extensive 18-month duration and a generous 45% discount. Assess your spa usage and budget to determine the level of commitment you desire, and choose the membership plan that aligns with your needs and offers the most enticing discount.