I have had Lion installed for a few days now so here is my opinion.

If you are considering installing on an existing Mac? WAIT until the first update has been released.

If you have a MacBook with the earlier style of trackpad and separate mouse button then you will not get the best mousing experience so maybe wait until you upgrade your computer. Lion needs a multitouch trackpad or Magic Mouse to work really well.

There are two issues that I have. These are reported elsewhere on various forums so it’s not just me and I have submitted bug reports to Apple.

1) The sound controls do not work on the internal speakers. There is a work around in place. Plug in an iPhone headset into the headphone jack, wait a few seconds and unplug. Speakers then work correctly.

2) The WiFi does not always come back on after sleeping the computer. The work around for this is not to sleep but to shut down the computer.

Hopefully Cupertino will get these addressed ASAP.

Otherwise it’s a nice OS and so far I am quite happy.

The killer feature is the auto save. It’s worth the asking price for this function alone. Launchpad and Mission Control are very clever, The Finder is improved so it’s all good.

My preferred method of ‘upgrade’ is to clone my hard drive then nuke and pave. In English: Format the drive and do a clean install then add my apps and documents back in. Often faster with less problems. If it all goes wrong then you can just reverse the process and clone the drive from the clone.