Hi there, not trying to put I-laps down at all cause in the right area it is a great system, our club started with the ILaps system basically because it's cheap and affordable for a starting club and while we were running on grass or indoors it worked great, but the moment we started to operate on a dirt track where dust and mud could become an issue we noticed it would miss the odd lap or two here and there and became almost unreliable in that fashion if you understand what I mean.
Over the past few months we have been fortunate enough to borrow/lend an AMB/Mylaps system and it has been working without fault be it a perfect racing day or slightly inclement and having transponders covered in dust/mud/fuel or whatever it still seems to count the laps. Hopefully in the near future our local council will assist us in purchasing our own system (with a bit of luck), but in my view (and i'm sure the view of our club) I would spend the extra moola and buy the My laps system up front. We don't panic with the club transponders due to price $240aus is a bit expensive for a club to have ten just in case. We try to let everyone that is going to race at our track know they will need a PT or a local buisiness house actually has a few spares and will hire them at $20/day if the people so wish.

All I can say is trying to tell members that have already spent $50 on a ilaps transponder that they need to spend another $130 or so on a AMB transponder aint a lot of fun.

Like I said i'm not a huge fan of the AMB system (or MYLAPS) it's damn expensive for what you get for a start, but it seems to be the nationally recognised system (in australia at least) and often your better off just spending the money up front.

Hope all goes well for you and good luck with your decision.