With a pool, you are at least safer knowing that you have a higher probability of solving blocks together, and therefore are more likely to receive shares, despite them being significantly smaller.
IMO unless you are running a multi-GPU rig and can get your electricity for free, or solo mining an altcoin that is new, I'd advise sticking to pools.
1. Low Difficulty/Network hash rate
2. Has a high block reward (lets say 200+ on a coin with a target block every 5 minutes)
wow,,, 2 days you get 0.4 btc, right? how speed R6850 / second?