That's really up to you, Esther. Several things have been fixed in the later versions, and it's your choice to decide if you want/don't want the newest version.
Here's a list of fixes from the Readme file that comes with version 1.00.05. Perhaps that will help you decide.
Fixed in 1.00.05
- Life event notifications were sometimes mixing up people's names when it coincided with someone going off to college. Fixed.
Fixed in 1.00.04
- People will sleep to a higher level of energy replenishment
- Adjustments made to offline food consumption, in-game hunger and eating
- Adjustments made to allow greater player influence on longevity
- Failsafe put in for refusal to breed
- Adjustments made to a couple of the more difficult trophies
Fixes in 1.00.03
- Working is a bit less tiring, other changes to energy usage and recovery
- Fix to prevent glove loss/corruption
- Emails-to-player now correctly reflect customized names
- New pet behaviors
- Pets no longer show up in store rotation once purchased
- Store rotation now every 4 hours instead of 8
- Story book shop item works now
Fixes in 1.00.02
- Unleashed several dozen missing behaviors. Get ready to see your family doing some new stuff.
- Tutorial no longer blocks checking of email for office career peeps
- Fixed some breeding bugs
Fixes in 1.00.01
- 2nd generation people no longer occasionally brainless
- 2nd generation people no longer occasionally inheriting 0 energy and 0 happiness
- Invisible pinball machine removed