SSD or HDD

I bought a KINGSTON SSDNOW to replace my 500gb HITACHI travelstar 5k500-B2 in my macbook pro mid 2010. The SSD's boot time and applications opening time are really faster but I found that the SSD is running warmer than the HDD: 40ºC for the SSD while the HDD is has between 25º and 30ºC. When I am using the SSD the CPU load is also higher. The battery life of the MBP when using the SSD is about 1 hour less than the HDD.
I have been reading on google that SSD are better than HDD, that they save more battery power and don't get hot.
I installed the TRIM ENABLER PATCH, and other tweaks found online.
I am wondering now is I mess something? and should I keep using the HDD then and sell out the SSD?
Your advises are welcome.

Unfortunately, not all SSD drives perform the same. I don't know anything at all about Kingston but it does sound like that drive may not be optimal.

The SSD drives that I and some other folks recommend are those sold by the folks at Mac Sales (Other World Computing). You can take a look at what they have to offer. LINK

For now, I would remove the SSD and put back the Hitachi Travel Star which by the way, is a good HD. I don't know if you can get a refund on the Kingston drive but you may be able to sell it on eBay or Craig's list.

thanks for your reply. I would like to buy the drives you recommended but I am not in the US. I am in East Asia. I don't know if those using the same SSD on MBP are having the same problem or it is a problem or it is the drive I have which is faulty. If the drive is faulty i think i can get it replaced.

I have the same MBP as you.
I replaced the 250GB HDD with a 256GB SSD from Crucial.
Works great. A bit pricey though.
I use the original HDD as a back up with Time Machine.