I have a mix of MR16 & GU10 lighting.

The MR16 used upstairs is a pain as due to extensive insulation, even
though I have a clear 200mm all round and then a fireproof container ...
the transformers still get too hot and fail.

I improved somewhat by using non-dichroic bulbs (Phillips Coolmax) but
it would be a lot getter if I could fit M16 LED bulbs ....

Are these sufficiently mature enough yet to consider using these ?

I tried a couple a few year back ... and they were pretty poor, as
technology has moved on considerably for LED thought I would ask here ...