Archer,
To my knowledge there have been very few recent complaints about commuting tickets. AJX basically use ANA, Star Alliance airlines, others in that order. This sometimes means an ANA flight to North America or Europe then a domestic flight. Rather than using a One World airline direct for example. I think this caused some angst initially but it is mainly sorted out now and they are being a little more flexible.
Access to the pension fund depends on what contract company you use and where your citizenship is. For example if you are a US citizen and go through CREW then I don't think you can access your 401K until a certain age. If you're from the UK and did 5 years with CREW then I believe you can get access to you pension money after some paperwork is done.
We have plenty of guys commuting from Europe. Uk, Denmark, Spain, Italy. I think they are mostly happy with the commuting deal.
I would think your experience on the 737 is more than enough for a gig here.
Hope that helps.