Depends on how much you're allowed to download a month (or how much you actually want to download). Personally I can get by with 40GB per month so the 120GB allowance lasts me 3 months which at $25 works out cheaper than paying $11 per month for 3 months. The 120GB option is basically for people that don't download much, say for example you only wanted to download 20GB per month, that $25 would last you 6 months which would have cost you $66 on the unlimited option. I find the 120GB for $25 options works best for me