The best feature of leased line services has been speed! It's almost double the speeds I had with my current ISP (Comcast). And if there were issues where it would slow down they're quick to correct them - within minutes as opposed to days like from Comcast/Verizon/etc etc. I don't dislike much at this point but one thing could be improved more than anything else; price! They charge extremely inflated pricing when compared to some other providers who offer similar features & packages. If you need faster bandwidth then lease lines are what you want because of their higher throughputs over fiber internet connections which can get bogged down by smaller files such as images. You'll pay less overall cost over time too through lower monthly usage fees versus cable companies.