I purchased this as I had bought another camera. This allows me to quickly swap from one camera to another when using my tripod. As the new camera only has a plastic thread, it means I can keep this attachment on with the thread being worn from constant use.
These are one of the easiest tyres I have fitted. They are cheap, but have a good tread pattern. The inner tubes are cheap though - one failed (seam split open) after riding for less than 2 miles. however customer service is excellent, I got another sent straight out to me. So tyres are good for low mileage riding - if you do a lot of miles then you would probably expect to pay more for a high quality tyre anyway. Inner tubes are cheap, may be useful to carry as spares..