Repair professionals and basement "hacks" can be differentiated by the quality of adhesives they use.
You want to use what is called VHB tape (very high bond)
3M sells VHB tapes that are approximately 10 lbs/inch which are very adequate ... but if you want the piece of mind that your repair is not going to lift or separate until the next time you are repairing their cracked screen, you want to find RED TAPE brand VHB tape, which has a bond rate of 16 lbs/inch.
Just as important as the quality of tape you are using, is that the frame of the iPad/iPhone is properly prepped with 91% (or better) Isopropyl alcohol and a microfiber cloth, to remove 100% of the old adhesive residue.
'''**If you are only removing 88% of the adhesive residue, you are wasting your time, you need to remove 100% of the old residue.
And lastly, to get the "factory" seal on your iPad repair, you need to apply a very slight pressure to the digitizer for 4-6 hours, to make sure that the adhesive remains in contact with the frame of the iPad while it is drying/curing. You can buy iPad presses made for this purpose, or at very least place your iPad face down on a towel, and put a 3" thick textbook/phonebook on it. Too much pressure will crack your new glass.
If you follow these simple steps, you will end up with a professional quality repair.