I really enjoy it and have had no problems with it. But if your happy with Lion I wouldnt bother. Personally if you do want to upgrade I would wait for 10.8.3 patch next month. Its supposed to have some more fixes and better video drivers. Till then your copy of Lion may be over all more stable.
Mac Mini: OS 10.8, i7 2.6Ghz, 8GB RAM, 1TB HDD, Intel HD4000 iGPU.
Gaming PC: Win7, i7-3770, 16GB DDR3-1600, nvGTX 560Ti SLI, 256GB 830series SSD.
MacBook Air 13", iPad Mini 16GB, iPod Touch 5th Gen 64GB, iPod Nano 4th Gen 8GB