SpotHero

Utterly unreliable. I paid in advance (including an oversize fee) for 3 different garages in New York City, to support a weekend trip my family was making. Each of the 3 garages were specifically listed by Spothero as supporting oversize vehicles up to certain dimensions. (And again, I paid Spothero in advance and received email confirmation: not just for the spot, but for the oversize fee.)
Upon arrival, 2 of the garages told me they could not accommodate me at all. And the 3rd insisted that I pay an extra fee on the spot, basically saying "too bad about Spothero; you're paying us too, and if you don't like it, move on".
Spothero's telephone support was "super"; they promised me "credit" and asked me to find another garage… which was impossible. (I ended up finding street parking.) The "credit" never materialized. I followed up twice during the subsequent weeks. Finally, almost 3 weeks later, I got an infuriating response chiding me for not being aware that some garages charge oversize fees in addition to the booking fee. Well, no duh, that's why I paid it in advance on Spothero (and have receipts from Spothero that says so.) Who needs this aggravation. AVOID SPOTHERO: a complete waste of time and money.