hi u can read up the reviews left behind by the buyer to the seller. most of them using it for lx3 seems quite happy with it althou the field of view might be slightly smaller than what u see in the lcd. but given the cheaper price alternative, it might be a good buy.
i bought a 3rd party LX3 converter lens conversion adaptor for $30 from JL Photo, and found out that they also sell the metal stickers for $47/piece by pre-order. however if ordering less than 8 pieces you have to top up another $8. too expensive for me.