I had Invisalign, best money I ever spent..
I paid €3500.. You get about 8-10 weeks (4-10 trays top and bottom) of trays at a time, change each set every two weeks, each one getting tighter and tighter pulling your teeth into line..
Quite painful for the first couple of weeks not gonna lie but grand after that..
Quicker than traditional tracks and you don't notice them.. Top job

I dealt with Dr.Barry Buckley in Clane general hospital no messing in and out free consultation