There are videos on the web that show the use of Buoy lifts. There is a short video at this web site
http://www.ironwoodpacific.com/products ... orring.htm
There are several varieties available, that fall essentially in 2 categories, simple ring and ratchet.
If you have more chain weight than anchor and get the hang of the right speed and knowing when the anchor is set in the ring, I think it's best. Many find it near impossible at first because if you don't get the anchor full up or have enough compensating weight and a clean transition from rope to chain, the anchor will tend to hang at the chain and slide back down while you are retrieving rode.
The second type, often used with shorter chain lengths and often a part of a typical Columbia River anchor set up, is a one way ratchet where you open a slide to pay out the rode, then throw the buoy in the water. When it's time to lift you use the boat power (at an angle) to lift the rode and as the rode goes through it will not let the anchor slide down again. An added benefit is that you can detach from the anchor (as in fighting a large fish) and come back later to the very same anchor set. I believe this type is easier for beginners, but wouldn't work well for people with 50 or more feet of chain.
I've used both types and never had concerns for prop fouling provided you take a steep angle and keep the rope taught so you can see it angling well out to port or starboard and make sure you are in neutral or dead while hand retreiving but I may not have been in such difficult situations. System is not as good if you are anchored in tight proximity to a flotilla of other boats (time to hand pull). Nothing worse than using this method and having to pull dozens of sturgeon hooks out out of your good rode (or dodging the bullets). I think these work extremely well in open bow boats. Probably less so on the bow of a C-Dory or other cabin boats.
At any rate, the advantages of buoy lifts are simplicity, cost and installation, maintenance and portability. Aside from the common costs (of anchor, rode and chain) the cost disadvantage for a good electric windlass set up is probably a $grand $ (but boy are they nice to have).
Chris