HikaShop has less features than its top competitor, but it compensates it because it works like charm and it is very easy to use and modify. The template is easily customizable. Support is great. I had 3 questions I asked in the support forum during different days, and first 2 was answered within 5 minutes.
HikaShop saved me lots of time & headache. I recommend this if you need a not so complicated shopping cart solution that just works.