A RAID1 of two intel SSDs should be both reliable and terribly fast; though writes are not the strong suit of Intel any longer. If you do a lot of reads, the Intel SSDs are great. Reliability should also be very good; but know that if the RAID1-layer/driver contains any weaknesses, it could still fail in a way that a single device without RAID wouldn't have failed. Generally, RAID1 on SSD should work fine.
The downside, of course, is lack of TRIM feature when doing RAID1. If uptime is not important, consider using the second as hot backup instead. If uptime is important, cope with the lack of TRIM and just use RAID1; potentially with some extra spare space reserved if you're going to write alot.
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