Product review (3 stars): Doing the Conversion Without the Kit - Here's How
I ended up returning this product and doing the conversion with ducting materials from the local hardware store. I don't think there's anything wrong with this kit, though the pre-cut pieces don't necessarily provide the versatility that you might be looking for in terms of attaching the exterior venting.

This review reflects my own experience doing the conversion from a back to a side vent, which reflects good advice I received reading these reviews.

Consider doing it yourself if you're comfortable trimming metal with aviation snips. If not, buy the kit. If you are, read on . . . you're about to save yourself 60 bucks (assuming you already have the aviation snips)

Step One - Remove the screw that holds the existing duct secure, and remove the duct. Set both aside because you're going to use them again.

Step Two - Pop out the insert on the appropriate side - there are three tabs that you depress - hit two and you're good. Set it aside because you're going to use it again.

Step Three - Cut the existing duct down so that the tab on the duct now aligns with the mount tab on the bottom of the dryer (you can't miss it). I swear that the LG engineers designed the placement/size of these tabs to do just this. Go slow and measure carefully. Secure the duct to the tab with that original mounting screw.

Step Four - You'll need a short length of 4" ducting and a 90 degree elbow - about $10 from Home Depot. Once you've got the cut down piece of ducting secured in the dryer, play around with the 90 degree elbow and ducting to get a sense of how long you'd like it to protrude from the side. I ended up attaching another 90 degree elbow because my vent is in the ceiling.

Step Five - Remember - when you're measuring, keep in mind the overlap in fitting together the male and female pieces of ducting. If you don't deal with ducting everyday (I don't), it's easy to screw up measurements. Just take your time.

Step Six -  Fit and tape the elbow and the straight duct piece that will exit the dryer before inserting. The nice thing about the 90 degree elbows you get at the store is that they straighten out, allowing you to insert the whole piece into the side access hole (with some pressure required - the hole is a tad small to accommodate the straightened elbow joints).  Once in the dryer work the joints of the elbow to get back to 90 degrees so that it connects into the cut down piece of ducting you've already mounted. This may take some doing, so practice outside the dryer first.

Step Seven - Tape the joint between the original cut down piece of duct and the elbow - it's challenging, but if you deal with small pieces of tape and are patient, you shouldn't have any issue.

Step Eight - Use the side insert cover you removed earlier to cover the back duct access port - you can use that aluminum tape to secure it to the back of the dryer and cover the small hole at the top that remains.

Done. It took me about an hour and a half or so - due mostly to trimming down ducting and reforming the 90 degree elbow inside the dryer. The advantages of doing this is that you have much more versatility in the length protruding form the side of the dryer, plus the satisfaction of saving quite a bit of money from what the kit costs ($70, including S/H). The con is that you have to cut the duct yourself. It's not difficult, but you need the right tool (aviation snips) and patience so you don't cut yourself.

I'm glad I chose to do it myself - very satisfying to have developed new handyman skills.

Good luck -