They are more puncture proof but not fail safe and you will still need to carry a innertube out onto the trail with you.. A few pals run tubeless and to be honest they are a bit here nor there with it.. Also getting the tyre to seat properly on the rim can be a real pain I have even needed to lend my compressor to a chap to get the job done
Weight im not convinced they are any lighter and have even heard they can be a bit heavier as im sure the tyre is a bit more meaty and you will need to use a tyre sealent to avoid thorn punctures etc..
One good thing is you are able to run lower pressures if needed without worry of pinched flats and they should also give a slighty better ride over really hard terrain..
Tubeless was hyped like crazy for a few years and then really died down as people found out that there wasnt that much to be gained..
Just my 2 pence im sure someone will come along and say BS to that but hayho!!
I pretty much agree with that. The weight loss is in a lot of cases negligible as UST tyres have a heavier carcass, but running them at lower pressures means more grip.
I had no problems fitting tubeless tyres to tubeless rims, no soap to lube and only a track pump (Schwalbe Rocket Ron on Mavic Crossland) maybe I was lucky!
I'm gonna keep running them on one bike and see how they are long term before deciding whether to convert the other bikes to tubeless