Yep, used the kit on site. Safer than the oxy acetylene that the welders use on site. There are as far as I know, no hazards from Co2 in this form as it's stored and used as a liquid, not a gas. Of course ventilation is required and you just open a window. The kit is a fraction of the cost of the big electric kit and a hell of a lot lighter. I store and carry my wee bottle of gas upright on a cheapo sack type trolley I bought in a local hardware shop and it's secured by a padlock and chain. This kit was my first choice as it can be used anywhere as it doesn't need power. I've had mine since 2014. Get yourself a good local gas supplier where you can first buy the bottle and have it refilled as needed. BOC will charge you an annual £80 rental fee on their bottles, so it's best just to buy one.