I've been meaning to post some stuff about kettlebells.
Couple things to address:
1) Where to buy kettlebells
You can go for the hardcore kettlebells which are good but expensive and shipping is generally expensive if you can't find good kettlebells in the store. Dragondoor.com seems to be the place for quality kettlebells in various KG sizes. I do not have any of their kettlebells so I can't speak personally for them.
Some cheap kettlebells aren't weighted properly. Also, some kettlebells are clearly designed for men with big hands as they seem to try to put quite a bit of weight into the handles making them thick and hard to hold. The best kettlebells I've found for the price are GoFit. I love GoFit products in general. You can find them at Target and other places like Dick's sporting goods. Amazon.com also sells them but shipping is a bit pricey.
2)What size of kettlebells to buy
Our body is composed of many muscles of various sizes. Slow-twitch, fast-twitch, small, large etc. Kettlebells are primarily designed to work the largest muscles of our body. Legs and back muscles are huge and can handle lots of weight and these are the muscles that kettlebells work primarily. That doesn't mean that other smaller muscles are ignored but they are worked secondarily.
So given the fact that kettlebells work the largest muscles of the body means that you can buy heavier kettlebells. I started with a 15lb kettlebell which I thought was a good introduction to using kettlebells. Primarily, I use a 20lb kettlebell and a 25lb kettlebell for my workouts. I also have a 35lb kettlebell and 45lb kettlebell which I use sometimes. For practical purposes, there is a point of diminishing returns based on size and most people probably would never use something more than a 45lb kettlebell and others may never touch a 45lb kettlebell. So if you are a woman and nervous about using kettlebells, I'd recommend 15 lbs as a starting weight. If you are a bit more confident, I'd say go with at least a 20 lb kettlebell. If you are a guy, I'd look at 25lb kettlebell. I don't think guys get nervous about flinging weights so I wouldn't make a recommendation for a nervous guy
3) Overall buying strategy for kettlebells
I have found that it is useful to have different kettlebell weights for different exercises. Advanced exercises may have you using 2 kettlebells of the same weight but most just require one kettlebell or can be modified for one kettlebell. I'm currently at the point where I want a second kettlebell of the same weight so I plan to buy a 20lb and a 25lb kettlebell soon. Later on down the road, I expect I'll want another 35lb kettlebell as well. Kettlebells are expensive though but so are weights in general. My advice is start small and grow your collection as your addiction grows
4) Kettlebells vs weight lifting
Kettlebells and weight lifting do share commonalities but kettlebells are a bit of a mix of weight lifting and cardio. Kettlebells can give you a total body cardiovascular workout. You will strengthen your muscles but you will also increase your cardiovascular endurance. Pavel Tsatsouline talks about effectiveness of kettlebells in his book "Enter the Kettlebell". He claims that there have been studies based on running where a group would run as part of their training and another group wouldn't run at all but instead did kettlebells. The group that just did kettlebells outran the group that ran for training. That is pretty amazing to think kettlebells can directly affect a totally different activity.
5) Workouts, books, etc
So I bought a couple DVDs and they were decent kettlebell workouts. I bought two books, "Enter the Kettlebell" and "From Russia with Love" which I think are outstanding books. The problem is none of that really helped me focus and create a plan of my own. The two books do have plans but well they didn't fit me. The books did help me develop my form though and I thought they were useful. I had been doing kettlebells intermittently but I didn't have a plan.
So someone sent me a link to Skwigg's blog on her experience with Kettlebelle Body.
http://skwigg.tripod.com/blog/index.blog?from=20081022
I looked at the blog and looked at the program. It was a bit expensive for some ebooks. I decided to buy the program though and I have to say I'm glad I did. I finally have a plan that is highly customizeable and gives me different workout plans to do. To be fair, I've only done 3 workouts so far but I'm impressed. It gives me the ability to do my structured but customized workouts, watch what I want on tv and do it within my own timeframe.
6) Anything else ???
Not for now.