The Sims 3 Teleportation Pad Lifetime Reward
Lifetime Happiness Points: 75,000
The most expensive LTR in the Sims 3 is not all that hot. Sure, you can teleport to work and the favorite fishing spot, but it's not going to save too much travel time unless your Sim is really busy. With the moodlet manager, Sims can stand around all day and night doing anything without ever needing to go home, so it's probably the better bargain.
The teleporter may occasionally fail, but you can upgrade it to have perfect teleportation. It can sometimes break and need repair. Weight the benefits and choose whichever upgrade you'd find more convenient.
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