Hi Barbelman,
I use the following reel, it will not completely prevent crows nests but, the magnets do make it much more controllable and easier for beginners, it keeps the spool spinning at more constant rate during the cast, after launching the bait try and keep your eye on your rig and all you need to do is use your thumb to stop it before it hits the water, play around with the magnetic settings start casting from max setting and go down as you become more confident, it is not a distance casting machine but, is dead easy to use and you can get most distance where the fish are, also adding some quality oil to the bearing will increase the distance out of the box.
Regards
Jonathan