I have been using Specsavers Easy Vision Contact Lens solution for several years now and find is effective and keeps my lenses clean.
The solution comes as part of your monthly lens package or it can be bought from Specsavers for £12.95 for 3 bottles. Therefore it is reasonably priced in comparison to similar products.
I use the solution in my lens container so my lenses soak in it overnight and whenever I'm not wearing my lenses. I find that it keeps the lenses clean and moist and I have never noticed any residue on the lenses.
I also use the solution when I am putting my lenses in; I squirt some solution onto the lens before I put it in, this helps to clean the lens and also makes it easier to go into your eye.
I would note that I don't have sensitive eyes and have never had any problems with solutions. However friends have commented that when they used this solution, they experienced a slight stinging sensation, therefore it might not be suitable for everyone, but as with all of these type of products you will need to try them for yourself.
Overall I think it is a good solution that keeps lenses clean and soft.