It's a 20-25 hour job for a first time DIY. As you surmise, not actually all that difficult, just tedious. I don't recall any impossible to access fasteners, and nothing is torqued to 300lb-ft for your enjoyment. Just take care not to damage any of the interior bits and life will be good.

I also have some first hand experience with the sealers. Mixed bag. The only one I would use is "cryo-chem." It's a two part formulation. First you add a drying agent to bind up all the water in the system. Run the system, then add the sealer (the sealers are all water activated epoxies). This stuff worked perfect. But I lost the compressor a year later, so can't say how long it will last. Don't think the compressor thing was related. Downside is it's an expensive treatment, and you need to change the dryer, recharge, etc. Parts cost is nearly the same as replacing the evap, though of course labor is much less.

I've also used a sealer which came in a single can. Not good, it activated in the dryer (which I didn't change, due to laziness). Cannot recall the name of that product. I just swapped in a new dryer, recharged, and it was good to go again; albeit with leaks.

My $.02 - replace the evap, it's the best solution long term.

- JimY