need to get a decent power of soldering iron to be able to transfer the heat fast enough. i like to tin the deans then do the cable. i hold my deans in a small table vice, when i have tinned the esc cable i set it onto the deans an put the iron on top of the cable. with a decent iron it flows very fast so you barely have to touch it to do the job.
Deans imo are a pain to work with, my favourite is plain bullets but if you want a covered connection i would go for ec3 for 2s or ec5 for bigger stuff. I used them with some 4s batteries an never had a problem, i didnt buy the official losi ones i went for the hobbyking copies
