Bosch-referred installation, worth it?

I received the L2 EVSE from Bosch, thanks for the $500 discount! They also sent a local electrician to check out my place and gave an estimate for the install. I had a couple other people come by for their own estimates as well. Overall, the Bosch price is a little bit higher than the others, BUT I believe I'll get 3 years of warranty on parts and labor, if I have somebody else do the install, I think the warranty is only 1 year. The other guys of course will have nothing to do with the L2 LVSE if something goes wrong. What's the reliability of Bosch? At this time I'm inclined to go with them for the added warranty.
Thanks,

The Bosch unit is really reliable and a relatively simple device. I don't see the need to pay more. If you think the extra cost would reduce your stress levels that is worth it. Any reputable, certified electrician will stand behind their work.