I have no experience with the purilens system, so I can't really speak to that. But I've been in my lenses for about a year now and have just been using the unisol to fill my lenses as my doctor suggested.

Also, make sure you get something to clean your lenses, nightly is preferable. I use this: http://www.amazon.com/Clear-Care-Hydrogen-peroxide-Cleaning/dp/B0076P12W2

This is important for your comfort, the lenses can get kinda gunky and possibly lead to infections if you don't keep them clean, so this is what my doctor suggested as well!

Good luck, hit me up ANY TIME!